. Agriculture through the laboratory and school garden. A manual and text-book of elementary agriculture for schools. Agriculture. CLASSIFICATION AND PR01'1:RTI OF SOIL ')1 (/) Allow the liquid t()(lii[) foi- half ;m hour, ami com- pare the water whirh now percolates ihrouoii with tiiat first percolated. Is it safe to depend upi)n the soil to act as a filter in purifyin*^ the water of wells from organic matter ? ( /) \'ery carefully pour ofi all the water remaining in the tubes, and weigh each tube with its contents, record the weights, and compare witli those of (<?). Which soil retain
. Agriculture through the laboratory and school garden. A manual and text-book of elementary agriculture for schools. Agriculture. CLASSIFICATION AND PR01'1:RTI OF SOIL ')1 (/) Allow the liquid t()(lii[) foi- half ;m hour, ami com- pare the water whirh now percolates ihrouoii with tiiat first percolated. Is it safe to depend upi)n the soil to act as a filter in purifyin*^ the water of wells from organic matter ? ( /) \'ery carefully pour ofi all the water remaining in the tubes, and weigh each tube with its contents, record the weights, and compare witli those of (<?). Which soil retained the greatest amount of water ? Experiment 6. —() Half fill a beaker, or tumbler, with water colored with red ink. (c) In a piece of pasteboard punch several holes corresponding in size and numl)er to the tubes used; thrust the tubes through the holes to three-fourths the distance, below, of the height of the beaker Now cover the beaker with this pasteboartl, allowing the tubes to extend down into the coloretl liquid (Fig. 17). {(/) Note the he'.ght to which the Capillary rise of liquid not Hqtiid rises iu eitcli tubc. In wliicli shown. highest? The wall of the tube attracts the film of water next to it, and tends to spread it out over the surface of the tube, overcoming the resistance of the surface tension of the liquid itself. Notice that the surface of the liquid both inside and outside of the tubes assumes a concave shape, on account of the creeping up of the liquid next to the wall, caused by the attraction between. FIG, 17. — APPARATUS KOR Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jackson, Caroline Ruth, 1871-; Daugherty, Amelia (Crum) "Mrs. L. S. Daughery. " 1859-. New York, O. Judd company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectagriculture, bookyear
