Principles And Practice of School Gardening
Principles And Practice of School Gardening
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In our eReader you can find the full English version of the book. Read Principles And Practice of School Gardening Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book Principles And Practice of School Gardening
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What colour is the remaining substance in each case ? This substance is called carbon.
Elements and compounds. In chemistry certain substances are called simple^ because they are composed of single elements, which implies that no matter to what tests they may be subjected, they do not yield any second element. Others are called complex sub- stances ; that is, they have been built up of two or more elements, and when treated in certain ways they yield up each of these elements in turn. Expt. 12 ...proves that plant-food is a complex substance, for when treated with iodine the material shows that starch is included in its composition, while burning makes evident the fact that it contains carbon, and some part has certainly passed away as gas. Now we have got one step further. Plant-food is a complex substance which is starchy in nature, and, for the building up of this starchy material, carbon has been employed.
Source of plant-carbon. The question arises, " Where does the plant obtain this carbon which goes to the formation of its food ?" This is a subject which for a long time gave much trouble, and still is very difficult to demonstrate by a simple experiment.
What to read after Principles And Practice of School Gardening?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Logan to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
What colour is the remaining substance in each case ? This substance is called carbon.
Elements and compounds. In chemistry certain substances are called simple^ because they are composed of single elements, which implies that no matter to what tests they may be subjected, they do not yield any second element. Others are called complex sub- stances ; that is, they have been built up of two or more elements, and when treated in certain ways they yield up each of these elements in turn. Expt. 12 ...proves that plant-food is a complex substance, for when treated with iodine the material shows that starch is included in its composition, while burning makes evident the fact that it contains carbon, and some part has certainly passed away as gas. Now we have got one step further. Plant-food is a complex substance which is starchy in nature, and, for the building up of this starchy material, carbon has been employed.
Source of plant-carbon. The question arises, " Where does the plant obtain this carbon which goes to the formation of its food ?" This is a subject which for a long time gave much trouble, and still is very difficult to demonstrate by a simple experiment.
What to read after Principles And Practice of School Gardening?
You can find similar books in the "Read Also" column, or choose other free books by Alexander Logan to read onlineMoreLess
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