This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...sugar, fat or proteid; or, have you evidence of the presence of any other substance? 126. Soak a very thin slice of carrot for a few minutes in iodine solution (par. 38), and then transfer to a mixture of 1 part water and 2 parts sulphuric acid. Note the changes of color which take place in the course of several ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 Excerpt: ...sugar, fat or proteid; or, have you evidence of the presence of any other substance? 126. Soak a very thin slice of carrot for a few minutes in iodine solution (par. 38), and then transfer to a mixture of 1 part water and 2 parts sulphuric acid. Note the changes of color which take place in the course of several minutes. Treat similarly a piece of filter paper or a bit of absorbent cotton. The substance which turns blue when thus tested is called cellulose. It is a carbohydrate, and forms the main part of the framework of all plants, although sometimes so mixed with other substances that it does not respond well to chemical tests until these substances are removed. 127. Are any coloring matters present in the earth-vegetables examined; and if so, are the pigments soluble in water? As regards nutritive value how should you say that earth-vegetables compare with grains, nuts, and pulse? 128. Sprouting of earth-vegetables may be readily accomplished, often with striking result. Select a large carrot, beet, or turnip; scoop out of the bottom a cavity large enough to hold several spoonfuls of water, and by means of strings passed through holes in the rim of the cavity, suspend the inverted tuber near a window. Keep the cavity filled with water, and before many days young leaves should appear. Onions, and sweet and white potatoes arranged in a jar or tumbler so that the base dips in water will sprout and continue to grow for weeks. Some of these plants should be sprouted also in the dark for comparison. What parts develop in each case? How long before the reserve food is exhausted? How does this compare with the time taken by the seedlings already studied? Can you explain the differences, if any? Have you any evidence that the parts in which the food is stored se...
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Add this copy of Students' Handbook to Accompany Plants and Their Uses to cart. $66.37, new condition, Sold by Booksplease rated 4.0 out of 5 stars, ships from Southport, MERSEYSIDE, UNITED KINGDOM, published 2015 by Arkose Press.
Add this copy of Students' Handbook to Accompany Plants and Their Uses to cart. $77.75, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2015 by Arkose Press.
