دورة تعلم البرمجة بلغة البايثون

                                           دورة تعلم البرمجة بلغة البايثون

                                 

                                     الدرس الاول

محتويات درس اليوم :

 مقدمة عن البرمجة بشكل عام

 أنواع لغات البرمجة واغراضها

 لماذا البرمجة بلغة البايثون

 البرمجة في البايثون

 انواعها

 تثبيتها

 وكتابة اول برنامج

                                      البرمجة

 تعريف:

هي عملية كتابة تعليمات وتوجيه أوامر لجهاز الحاسوب يقوم بمعالجتها واخراج النتيجة

تسمي المدخلات inputs ب ال Data او البيانات و المخرجات outputs outputs تسمي ب المعلومات Informations Informations

وتكتب هذه التعليمات بستخدام لغات البرمجة.

                    أنواع لغات البرمجة واغراضها

 هناك حوالي 662 لغه برمجيه حول العالم , منها مستخدم لحد الان ومنها من عفا عليه الزمناما

 ومن بين هذه اللغات واللتي تعد لها تأثير قوي جدا في الساحة هي :

 جافا gava 

 تستخدم في برمجة تطبيقات الاندرويد

 جافا اسكريبت :gava script 

 تستخدم في الويب بشكل كبير

 السي \ السي ++ c\c++

 في الالعاب

 الروبي :R

 الاختراق

                                      بايثون

 مميزاتها :

1 - تعد سهلة نسبيا مقارنة بالغات الثانية خصوصا ال c/ c++ و ال java java

2 - لا تحتوي على فواصل منقوطة ;semicolon semicolon لنهاية السطر

3 - لغة مفسرة interpreter language interpreter language interpreter language interpreter language interpreter language interpreter language سهلة التعديل عليها

4 - تستخدم في اغلب المجالات

 عيوبها

1 - بطيئ

                        مجالات البايثون

 مجال الويب في Back End 

 Flask

 Django 

 الواجهات الرسومية

 QT

 Tkinter 

 Kivy

 الشبكات والبرتكولات

 Socket

 تحليل البيانات

 Pandas

numpy

نسخ البايثون

 ولكل نسخة من البايثون 2 او 3 لديها نسخة ال 32 و 64 bit  

                                                                 :  python2 

                                                            python2.2 -

                                                            python2.6  -

                                                            python2.8  -  

                                                                   : python3

                                                            python3.2  -

                                                            python3.6  -

                                                            python3.8  -

           مانحتاج الي تثبيته للبداية في البايثون

- تثبيت نسخة البايثون[حسب نوع الجهاز 32  bit 64 or bit]

 من الموقع الرسمي

- تحميل محرر الاكواد code editor 

                              ما هو محرر الاكواد

 عبارة عن برنامج مثل ال notepad  مصمم لكتابة اكواد برمجية عليه

انواعه:

 Code Stdio 

 Atom

++ Notepad

 Vim

pycharm

نكت مضحكة

 

• مره واحد اشترى خاتم لخطيبته قالوله اهلها تعال لبسها الخاتم ضرب الطاوله قال خسارة ياليتني شريت لها سروال.
• 
  
• وحده تقول ؛ رحنا انا وجدتي نشتري كوايه ملابس و اول ما دخلنا المحل قالت جدتي لو سمحت ورينا مكاويكم. 
• 
  
• مره واحد معجب بجارته وزوجها ميت قرر يصارحها راح دق بابها فتحت الباب وشافها بدون مكياج انصدم وإرتبك ماعرف ايش يقول سألها مافي أخبار عن المرحوم .
• 
  
• مره واحد حران ومعندوش تكييف ولا مروحة اخذ لبوس خافض الحرارة.
• 
  
• الحمار في فرح أسد فقال له الأسد بس انا معزمتش حمير ايه اللي جابك فرحى، قاله أنا كنت زيك أسد ولما اتجوزت بقيت حمار.
• 
  
• مره فيه واحده ست سايقه على الجي بي اس قالها إنحرفي قليلا فقلعت الطرحه.
• 
  
• مره واحد كان بيتفرج على مقطع ساخن إتلسع.
• 
  
• واحد الدكتور قاله اعمل اشعه فركب الاسانسير لقى كلو مرايات فافتكر ان هو ده جهاز الاشعه وقلع هدومه ولما الاسانسير فتح ممرضه شافته وصرخت قالها يالهوى هو انا عندى سرطان.
• 
  
• فتاة تسأل حبيبها: هل ستظل تحبني بعد الزواج؟ فرد قائلاً: طبعاً حبيبتي إذا لم يمانع زوجك

بنت تشكي لأبوها من عيال الحارة
ينادونها كيكة
راح أبوها للعيال:
وقال وﷲ لو أسمع واحد فيكم ينادي بنتي(كيكة)إني بصفعه!
بعد يوم مرت البنت مع أبوها والشباب جالسين
قال ١ :ماء
قال ٢ :سكر
قال ٣ ؛دقيق
قال ٤ :كريمة شوكولاته
قال ٥ :بيض
التفت أبو البنت وهو يضحك:إذا فيكم خير اخلطوها.كيكة

واحد وزوجته نايمين بخيمة
قالها شايفة الصبح والشمس
قالت ايه شايفتهم
قالها تدرين وش يعني هذا
قالت صباح وتفائل
قالها لا يخبلة انسرقت الخيمة.رومانسية

واحد يسأل خطيبته :
في احد قبلي لمس يدك ؟
سكتت
قالہا : زعلتي ؟
قالت : لا بس أعدهم.

A Hobby Greenhouse Will Get You Growing!

  

A Hobby Greenhouse Will Get You Growing! 

For individuals who might want to accomplish more cultivating however live in a short developing season region, a leisure activity nursery is the appropriate response. A leisure activity nursery isn't adequately enormous to create vegetables or blossoms on a business premise. It will, in any case, give you a spot for a tomato plant or two and some new greens regardless of whether you live in the northern areas. Nursery lovers even have their own affiliation, called the Hobby Greenhouse Association, which distributes a quarterly magazine. The association additionally sponsers occasions and assists people with interfacing with find support with the part of cultivating that they are keen on, regardless of whether it's developing prickly plants or saving seeds. 

In case you are on the lookout for a pastime nursery, there are a few kinds available. The littlest kind isn't adequately huge to stroll into and should be gotten to from an external perspective. It takes after an antiquated telephone corner made the entirety of glass and equipped with racks. This sort is intended to fit however many plants as could be allowed in as little a spot as could really be expected. The racks are made of glass to permit however much light as could be expected to arrive at plants on the lower racks. Another modest rendition of this kind of side interest nursery is racking covered with a zippered tent of clear plastic. This kind of course of action is extraordinary for the limited scale diversion grounds-keeper needing a spot to keep her blossoms or houseplant begins. 

There are an assortment of plans of pastime nursery that are adequately enormous to stroll into yet made totally of clear glass or plastic. They are frequently about a similar size as a little stockpiling building. Some autonomous manufacturers have begun making these to sell locally. Among public brands, one of the most delightful is known as the "Sunlight based Prism." It is called this due to it's special development. This interest nursery is made of a solitary piece of strong clear plastic which is intended to work like little crystals one next to the other. They trap the beams of the sun and shoot them back into the nursery at all points. Therefore, these little nurseries are said to sparkle when the climate is shady. 

Better pastime nurseries are outfitted with programmed sensors that open vents which permit ventilation and hold the inside temperatures back from getting excessively high. These are an incredible work saver, yet can get costly. Another advantage some of the time found in more pleasant nurseries is an implicit water system or clouding framework. Individuals from the Hobby Greenhouse Association, or HGA, have imagined many fascinating plans of nurseries. 

In case planting is your pastime, nursery developing will intrigue you. With a nursery, you can have the most punctual tomatoes and salad greens the entire year. You can likewise begin seedlings for the principle garden right off the bat in the spring when outside temperatures would kill them. A diversion nursery can be a wise venture.

Clay Pot Crafts: Make a Bell for the Porch

Earth Pot Artworks: Make a Chime for the Yard 

Dirt pot makes are an adorable method to make home embellishments. In earth pot makes, dirt window boxes can be created into an assortment of improving things that appeal to landscapers. Typically, the crafter starts with new pots. The pots are frequently embellished with paint just as being integrated with rope or rope to make things. 

Pots for earth pot artworks can be bought in various sizes, from small ones not more than 2 creeps in width, to gigantic ones over a foot across. For a starting task, start with more modest pots. The amateur ought to likewise pick earth pot creates that don't utilize such a large number of pots in too elaborate a plan. 

An illustration of a decent specialty for another person at earth pot makes is to make a chime from two dirt pots. Get one pot that is around five or six crawls in distance across, and another that is tiny. You will utilize the little one as the clapper for the ringer. You will likewise require some ornamental line, two huge wooden globules, and paint in wanted tones. You may likewise wish to buy some paste on gems to enliven the chime. The ringer makes a decent design for an entryway patio. 

Cut the string two feet (60 cm.) long. Overlay the end more than 3 inches (8 cm.) and tie in an overhand bunch, making a circle. This circle is for draping the chime from a snare or a nail. Presently flip around the bigger dirt pot. Pass the last detail of the line down through the opening in the pot. Lay the pot on its side and slide one of the huge wooden dabs up the line until it is around 10 inches (25 cm.) from the remaining detail. Presently tie the string around the dab with the goal that the dot can't slip from its situation on the string. On the off chance that you have done this effectively, you can lift the pot by the circle. In dirt pot makes, the globules should be adequately huge to prevent the rope from going through the opening in the lower part of the pot. 

Totally free finish of the line, you will append the little pot similarly. Slide the little pot up the rope to make it simpler to tie the other enormous wooden dab on the finish of the line. Presently when you lift the whole plan by the circle, the more modest pot should hang openly inside the bigger pot, making a charming sound when it applauds against the bigger pot. 

Finish the outside of the bigger pot with paint as wanted. You might jump at the chance to paint it in highly contrasting patches for a Holstein cow topic. You may likewise prefer to adorn the highest point of the chime with silk or dried blossoms and plant life and a lace bow. 

For a minor departure from this specialty, make three of the chimes and balance them from a flat piece of driftwood or other intriguing piece of regular wood. When making hanging dirt pot creates, consistently ensure the dabs are adequately enormous and are tied firmly set up, in light of the fact that the earth pots will cushion in the event that they tumble to the ground. 

Other earth pot creates incorporate making an enormous doll or scarecrow of settled pots hung together and painted. The doll can sit on a seat or a stage of the entryway patio. Paint his face to resemble a scarecrow, a jack-o-lamp, a dwarf, or a kid. Mud pot creates are particularly fit to being shown outside.

 

What Innovation Can Do to Your Life

 

What Innovation Can Do to Your Life

It's a talent that everyone has, yet they think they don't. The power of innovation. If you've ever marvelled at somebody's creative prowess, guess what, you can create and innovate too. It just takes time. Everyone is born creative. The box of crayons in kindergarten were not limited to those who possessed potential; because the truth is, everybody has potential.

You know how long it took to learn to ride a bike or drive or to never commit the same mistake again? It's the same with innovation. It takes a  bit of practice and a lot of time before this mind function comes easily  when called. This article will teach you a few tips on how to bring innovation into your life.

Don't listen to what other people say. Follow the beat of your own drum. Allowing for the input of other people will only bring cacophony to the music you are trying to make. If you have an original idea, don't waste your time and effort trying to make people understand. They won't. And the help you will probably get comes in the form of negative feedback. If all those geniuses listened to their peers, we would probably still be living in the middle ages.

Spend time on it. I cannot stress that enough, although, please do not mistake this tip to tell you to quit your day job entirely. Do not. This involves some tricky time management but with a little discipline you'll be able to squeeze both in. 

Exercise. Take a walk. Run a mile or two. Send all those endorphins coursing through your veins. Exercising certainly clears and relaxes your mind and allows for anything to pop up. 

Record your dreams. Aren't some of them just the craziest things that your conscious mind would never have thought of? If you've had these dreams before, and I'm sure have, this only shows you the untapped innovative power you have lying within. So jot down those notes. Those dreams may just create an innovative spark in you.

Find your own style. You can always tell a Van Gogh from a Matisse. You'll know Hemingway wrote something by the choice of words on the paper. So it is the same with you. People will appreciate your innovation more because it is uniquely yours and that no one else would have thought of what you were thinking. That will let people see how valuable an asset you are. 

Don't hide behind nifty gadgets or tools. You don't need the most expensive set of paints to produce a masterpiece. The same way with writing. You don't need some expensive fountain pen and really smooth paper for a bestseller. In fact, J.K. Rowling wrote the first book of the Harry Potter Series on bits of tissue. So what if you've got an expensive SLR camera if you're a crappy photographer? Who cares if you've got a blinging laptop if you can't write at all? The artist actually reduces the number of tools he has as he gets better at his craft: he knows what works and what doesn't. 

Nothing will work without passion. What wakes you up in the mornings? What keeps the flame burning? What is the one thing that you'll die if you don't do? Sometimes people with talent are overtaken by the people who want it more. Think the hare and the tortoise. Ellen Degeneres once said that if you're not doing something that you want to do, then you don't really want to do it. And that's true. Sometimes you just want something so bad you become a virtual unstoppable. And that is passion. Passion will keep you going. 

Don't worry about inspiration. You can't force it; inspiration hits when you least expect it to, for those unpredictable yet inevitable moments you should prepare. An idea could strike you on the subway, yet alas, you poor unfortunate soul; you have no sheet of paper to scribble down a thought that could change the world. Avoid these disasters. Have a pen and paper within your arm's reach at all times.

I hope this article has helped you bring more innovation into your life. Keep in mind that you're doing these things for your own satisfaction and not anybody else's. But soon enough they will notice, and everything should snowball from there.

FRUIT COCKTAILS.

 Natural product Mixed drinks. 

Mixed drinks made of a mix of natural products are regularly filled in as the main course of a supper, normally a lunch get-together or a supper, to go before the soup course. In warm climate, they are an astounding substitute for hefty mixed drinks made of lobster or crab, and they might even be utilized to supplant the soup course. The organic products utilized for this reason ought to be the more corrosive ones, for the acids and flavors are expected to fill in as a canapé, or a similar reason for which the hot and profoundly prepared soups are taken. Organic product mixed drinks ought to consistently be served super cold. 

Grapefruit mixed drink. 

- - - - - - - - - - 

The mixed drink here clarified might be served in stemmed glasses or in the shells of the grapefruit. In the event that the natural product shells are to be utilized, the grapefruit ought to be cut into two sections, somewhere between the bloom and the stem closes, the organic product eliminated, and the edges of the shell then, at that point indented. This arrangement of serving a mixed drink ought to be embraced just when little grapefruits are utilized, for if the shells are huge more organic product should be utilized than is pleasant for a mixed drink. 

2 grapefruits 2 oranges 1 c. diced pineapple, new or canned Powdered sugar 

Eliminate the mash from the grapefruits and oranges. Notwithstanding, if the grapefruit shells are to be utilized for serving the mixed drink, the grapefruit ought to be sliced down the middle and the mash then, at that point removed from the skin with a sharp blade. With the areas of mash eliminated, cut every one into a few pieces. Add the diced pineapple to different natural products, combine as one well and set on ice until altogether chilled. Put in mixed drink glasses or grapefruit shells, pour a spoonful or two of squeezed orange over each serving, sprinkle with powdered sugar, decorate with a cherry, and serve super cold. 

Summer mixed drink. 

- - - - - - - - 

As strawberries and pineapples can be gotten new simultaneously throughout the late spring, they are regularly utilized together in a mixed drink. When improved somewhat with powdered sugar and permitted to become super cold, these natural products make a scrumptious blend. 

2 c. diced new pineapple 2 c. cut strawberries Powdered sugar 

Set up a new pineapple, and cut each cut into little pieces or dice. Wash and structure the strawberries and cut them into little cuts. Blend the two leafy foods them with powdered sugar. Spot in mixed drink glasses and permit to remain on ice a brief time frame prior to serving. 

Natural product mixed drink. 

- - - - - - - - 

A natural product mixed drink legitimate is made by joining various types of natural product, like bananas, pineapple, oranges, and maraschino cherries. Such a mixed drink is served in a stemmed glass set on a little plate. Nothing more delectable than this can be ready for the main course of a supper or a lunch meeting that will be served gently. Its benefit is that it tends to be made at practically any period of the year with these specific natural products. 

2 bananas 1 c. canned pineapple 2 oranges 1 doz. maraschino cherries Lemon juice Powdered sugar 

Strip the bananas and dice them. Dice the pineapple. Eliminate the mash from the oranges in the way, and cut each part into a few pieces. Blend these three organic products. Slice the cherries down the middle and add to the combination. Set on ice until completely chilled. To serve, put into mixed drink glasses and add to each glass 1 tablespoonful of maraschino juice from the cherries and 1 teaspoonful of lemon juice. Sprinkle with powdered sugar and serve.

Sports Recreation: Relieve Stress and Have Fun

 

Sports Recreation: Relieve Stress and Have Fun

The world we live in is becoming progressively quick moving, distressing, and loaded up with duty. Along these lines, everybody needs some an ideal opportunity to unwind and have some entertainment. Our advanced lifestyle additionally will in general be stationary, and the suppers we eat are regularly not extremely sound. Exercise is a vital part in reestablishing us. Hence, sports entertainment exercises are the absolute best amusement we can pick. There are numerous alternatives for side interests to give sports amusement. You might even need to get familiar for certain new sporting athletic abilities. 

Courses to master new games amusement abilities can be discovered on the web and in bigger urban areas. You can learn and partake in group activities through the nearby Y and different associations. Group activities amusement exercises you may get a kick out of the chance to partake in incorporate softball, baseball, b-ball, and at times soccer for more youthful individuals. Another group activity you may appreciate is bowling. Notwithstanding your expertise level you can discover a bowling crew to mess around with. 

Singular games diversion exercises you can learn and partake in incorporate golf, tennis, running, high-impact dance, tumbling, and horseback riding. Try not to disregard bicycling and weight preparing as well. Large numbers of these games can be learned at the neighborhood Y too. For a portion of these, you'll need to have a companion to play against or share the exerience with. Numerous sprinters, for example, as to run with a companion. Also, games like tennis and handball truly need collaboration for best outcomes. 

In the event that you'd prefer, you can find out about sports amusement abilities on the web. You can discover courses to show practically any game or action you can consider including submerged hockey, fly-fishing, and para-skimming in the Alps! Obviously, except if you can get a few involved encounter you'll just have the speculations of the game. All things considered, online courses are a decent method to experience various games and sporting exercises you may sometime need to test. 

A truly fun games entertainment game you may get an opportunity to play is ping pong. Ping pong, or table tennis as it is here and there called, is played on a table with elastic covered oars and very lightweight plastic balls. You should hit the ball with your oar so it strikes the table and clears the net before your rival strikes it and bobs it back to you. One approach to turn out to be more adroit at ping pong and increment your shot at winning is to some of the time hit the ball harder than at different occasions. This keeps your adversary think about what you will do straightaway. 

Sports entertainment exercises are an extraordinary method to get practice and assuage pressure. They are likewise loads of fun. Regardless of whether with companions or alone, everybody needs a most loved games amusement to partake in. 

Sports Recreation: Relieve Stress and Have Fun 

The world we live in is becoming progressively high speed, unpleasant, and loaded up with obligation. Along these lines, everybody needs some an ideal opportunity to unwind and have some amusement. Our advanced lifestyle additionally will in general be stationary, and the suppers we eat are regularly not extremely solid. Exercise is a vital segment in restoring us. Consequently, sports diversion exercises are probably the best entertainment we can pick. There are numerous alternatives for side interests to give sports amusement. You might even need to become familiar for certain new sporting athletic abilities. 

Courses to master new games diversion abilities can be discovered on the web and in bigger urban communities. You can learn and partake in group activities through the nearby Y and different associations. Group activities entertainment exercises you may jump at the chance to take part in incorporate softball, baseball, b-ball, and here and there soccer for more youthful individuals. Another group activity you may appreciate is bowling. Despite your ability level you can discover a bowling crew to mess around with. 

Singular games amusement exercises you can learn and take part in incorporate golf, tennis, running, oxygen consuming dance, vaulting, and horseback riding. Try not to disregard bicycling and weight preparing as well. A large number of these games can be learned at the nearby Y too. For a portion of these, you'll need to have a companion to play against or share the exerience with. Numerous sprinters, for example, as to run with a companion. Furthermore, games like tennis and handball truly need collaboration for best outcomes. 

On the off chance that you'd prefer, you can find out about sports amusement abilities on the web. You can discover courses to show practically any game or movement you can consider including submerged hockey, fly-fishing, and para-floating in the Alps! Obviously, except if you can get a few active encounter you'll just have the hypotheses of the game. In any case, online courses are a decent method to experience various games and sporting exercises you may some time or another need to test. 

A truly fun games amusement game you may get an opportunity to play is ping pong. Ping pong, or table tennis as it is now and again called, is played on a table with elastic covered oars and incredibly lightweight plastic balls. You should hit the ball with your oar so it strikes the table and clears the net before your adversary strikes it and ricochets it back to you. One approach to turn out to be more proficient at ping pong and increment your shot at winning is to at times hit the ball harder than at different occasions. This keeps your adversary think about what you will do straightaway. 

Sports entertainment exercises are an extraordinary method to get practice and assuage pressure. They are likewise loads of fun. Regardless of whether with companions or alone, everybody needs a most loved games amusement to partake in.

THE GENESIS OF SOIL.

 THE GENESIS OF SOIL. 

Soil primarily had its beginning from rock along side animal and vegetable decay, if you'll imagine long stretches or periods of your time when great rock masses were crumbling and ending . Heat, water action, and friction were largely liable for this. By friction here is supposed the rubbing and grinding of rock mass against rock mass. consider the large rocks, an ideal chaos of them, bumping, scraping, settling against each other . What would be the result? Well, i'm sure you all could work that out. this is often what happened: bits of rock were worn off, an excellent deal of warmth was produced, pieces of rock were pressed together to make new rock masses, some portions becoming dissolved in water. Why, I myself, almost feel the strain and strain of it all. Can you?



Then, too, there have been great changes in temperature. First everything was heated to a heat , then gradually became cool. Just consider the cracking, the crumbling, the upheavals, that such changes must have caused! you recognize a number of the consequences in winter of sudden freezes and thaws. But the small samples of bursting water pipes and broken pitchers are as nothing to what was happening within the world during those days. The water and therefore the gases within the atmosphere helped along this crumbling work.



From all this action of rubbing, which action we call mechanical, it's easy enough to know how sand was formed. This represents one among the good divisions of soil sandy soil. the ocean shores are great masses of pure sand. If soil were nothing but broken rock masses then indeed it might be very poor and unproductive. But the first sorts of animal and vegetable life decaying became a neighborhood of the rock mass and a far better soil resulted. therefore the soils we speak of as sandy soils have mixed with the sand other matter, sometimes clay, sometimes substance or humus, and sometimes animal waste.



Clay brings us right to a different class of soils clayey soils. It happens that certain portions of rock masses became dissolved when water trickled over them and warmth was plenty and abundant. This dissolution happened largely because there's within the air a particular gas called CO2 or acid gas. This gas attacks and changes certain substances in rocks. Sometimes you see great rocks with portions sticking up looking as if that they had been eaten away. acid did this. It changed this eaten part into something else which we call clay. A change like this is often not mechanical but chemical. The difference within the two sorts of change is simply this: within the one case of sand, where a mechanical change went on, you continue to have just what you started with, save that the dimensions of the mass is smaller. You started with an enormous rock, and ended with little particles of sand. But you had no different quite rock within the end. Mechanical action could be illustrated with a bit of sugar . Let the sugar represent an enormous mass of rock. hack the sugar, and even the littlest bit is sugar. it's with great care with the rock mass; but within the case of a chemical process you begin with one thing and end with another. You started with an enormous mass of rock which had in it some that became changed by the acid working on it. It led to being a completely different thing which we call clay. So within the case of chemical process a particular something is started with and within the end we've a completely different thing. The clay soils are often called mud soils due to the quantity of water utilized in their formation.



The third kind of soil which we farm people need to affect is lime soil. Remember we are thinking of soils from the farm point of view. This soil in fact ordinarily was formed from limestone. even as soon together thing is mentioned about which we all know nothing, another comes from which we are even as ignorant. then an entire chain of questions follows. Now you're probably saying within yourselves, how was limestone first formed?



At just one occasion ages ago the lower animal and plant forms picked from the water particles of lime. With the lime they formed skeletons or houses about themselves as protection from larger animals. Coral is representative of this class of skeleton-forming animal.



As the animal died the skeleton remained. Great masses of this living matter pressed all at once , after ages, formed limestone. Some limestones are still in such shape that the shelly formation remains visible. Marble, another limestone, is somewhat crystalline in character. Another well-known limestone is chalk. Perhaps you want to understand how of always having the ability to inform limestone. Drop a touch of this acid on some lime. See how it bubbles and fizzles. Then drop some on this chalk and on the marble, too. an equivalent bubbling takes place. So lime must be in these three structures. One doesn't need to buy a special acid for this work, for even the household acids like vinegar will cause an equivalent result.



Then these are the three sorts of soil with which the farmer has got to deal, and which we wish to know . For one may learn to understand his garden soil by studying it, even as one learns a lesson by study.