. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. IQhrs As was expected the rates of flow in the different cylinders werematerially increased, averaging about two hours faster to a depth ofthirteen mches This emphasizes the importance, in practice, ofkeeping the surface of the soil loose, thus increasing the amount ofirrigation or rain water entering the soil in a given time. Here againhowever some difficulty was experienced in securing uniform resultsespecially with the smaller tube
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. IQhrs As was expected the rates of flow in the different cylinders werematerially increased, averaging about two hours faster to a depth ofthirteen mches This emphasizes the importance, in practice, ofkeeping the surface of the soil loose, thus increasing the amount ofirrigation or rain water entering the soil in a given time. Here againhowever some difficulty was experienced in securing uniform resultsespecially with the smaller tubes. It seemed almost impossible to get acylinder filled twice m the same way: and the most divergent results 162 UNIVERSITY OF CALIFOENIA—EXPERIMENT STATION. were the consequence. Thus, in six trials with the f-inch and T%-inchrenders Tfferenoes of all the way from four to seven hours wereobtained- and these, too, after the most careful weighings and fillingsIn sheerdesperatio. the old method of filling in the entire weight ofoil at one Ume, instead of piecemeal to the graduated marks, was Time, in liours. •ui-. — 5-//7. C/Ziic^er Z% 177 ?% ? / 77 ^//t-17 ^. ... IV. Kateso. ^^^^^^<^^^^^^^^^^\^iiT^-^r^^ diameters, surlace» resorted to. This was done by tapping the cylinder quite vig^oi^lywhile pouring in the soil. Then after the entire mass was in, the toprndwas™rely closed, the cylinder inverted, and the soil loosenedthen bv re-inverting the cylinder and tapping gently the soil wasIroSghlto the required to^ mark. In this -^ J-^ ^^^ou^^results were obtained. But it served to impress the fact that although PERCOLATION OF WATER THROUGH SOILS. 163 the diameters of the cylinders used do not materially affect the rates offlow, it IS far more difficult to secure uniform results when cylinders ofsmall diameters—say less than one inch—are used. For in this casemuch smaller masses of soil are dealt with, and thus small differencescount, where they would play but a tri
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
