. The principles of agriculture; a text-book for schools and rural societies . n19S. In general speech itmeans the appropriation ofprepared or digested food, asthe assimilation of the foodby the blood, or protoplasm. 1965. Chlorophyll is thegreen coloring matter ofplants. It looks to be in theform of minute grains. Mostof the cells in Fig. 38 containchlorophyll grains. 198c. Plant-food, in thesense in which the term ishere used, is a product of pho-tosynthesis,—sugar, starch orsome similar material. Incommon speech the term foodis used to designate any ma-terial taken in and ultimatelyused by
. The principles of agriculture; a text-book for schools and rural societies . n19S. In general speech itmeans the appropriation ofprepared or digested food, asthe assimilation of the foodby the blood, or protoplasm. 1965. Chlorophyll is thegreen coloring matter ofplants. It looks to be in theform of minute grains. Mostof the cells in Fig. 38 containchlorophyll grains. 198c. Plant-food, in thesense in which the term ishere used, is a product of pho-tosynthesis,—sugar, starch orsome similar material. Incommon speech the term foodis used to designate any ma-terial taken in and ultimatelyused by the plant, as nitrates,potash, water; and a generaluse of the term is so wellestablished that it cannot beoverthrown. l9Sd. For further light onassimilation, compare Arthurand MacDougal, LivingPlants and Their Properties, pp. 145-152. 199a. Place under a funnel in a deep beaker, containingfresh spring or stream water, growing bits of water-weed(Elodea CanadenMs), and invert over the end of the funnel a test-tube filled with water, as in Fig. 41. In the sunlight bubbles of. Fig. 41. Experiment to show the givingoff of oxygen. HOW THE PLANT LIVES 129 gas will be seen to rise and collect in the tube. If a sufficientquantity of this gas could be quickly collected, on testing itwith a lighted taper the flame would be seen to quicken per-
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