. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. 45 1 15 47 1 29 58 i 1 47 59 1 ]^ 47 9 54 10 54 20 2 00 Total time.— 4i 56»i° ^ et 17»i» 9i-» 43-» 10 15»° IB 62i» Now the surface of the soil in this set of experiments was tamped down evenly so as to make it level and smooth, as well as to bring the fasi portton of the soil, put into the tube, down to the mark. It occurred f the writer that possiblv this tamping might not have been done to Ltme extent in^each cylinder; possibly the i-inch tube was firmed ^h ih ^n^aiSc
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. 45 1 15 47 1 29 58 i 1 47 59 1 ]^ 47 9 54 10 54 20 2 00 Total time.— 4i 56»i° ^ et 17»i» 9i-» 43-» 10 15»° IB 62i» Now the surface of the soil in this set of experiments was tamped down evenly so as to make it level and smooth, as well as to bring the fasi portton of the soil, put into the tube, down to the mark. It occurred f the writer that possiblv this tamping might not have been done to Ltme extent in^each cylinder; possibly the i-inch tube was firmed ^h ih ^n^aiSch^andtLih ^i^:::ti:::t:t:^-^^H=Si: df: litle t^^^^S^ ^i ^ sis s9i^i^ tr-^^^^^tiE c ff«+Pv inthe second trial. It became slower than the first trial PERCOLATION OP WATER THROUGH SOILS. 159 tion it was broken. A new one was prepared; this time the calibration ^h rl uFlr^^A ^^l:^ -\ ^^ ^^^^y fil^d, as before, and athird trial made. This time the rate of flow was very materiallydiminished, being within four minutes of that in the A-inch tube andthus bringing the results well within the limits of comparison. Depth, in inches. It IS fair therefore, to assume that there was some error in thecalibration of the old cylinder, and the first two trials may be disre!garded m making up the averages and comparisons If, then the averages of the two trials with the 5-inch and 2#-inchcylinders, the third result in the |-inch, and the one made with theTT-mch are compared, it will be seen that the results at the thirteen- 160 UNIVERSITY OF CALIFORNIA—EXPEEIMENT STATION. inch mark are within an hour of one another. The differences notedinch ^arK are wiL ^^^^^ obtained in the same be ween t^^.^yl^if^^f^fefo assume that, other things being equal,SSmeteroMh^ tube:ted in laboratory soil-percolation experi-ments do not affect the results to any material extent. TABLE IV. s„nwiNG THE Rates or Flow in Oylindees of Diffeeekt Diameiees, THE SollL EACH CASE BEING PiLLED TO THE SAME WEIGHT PEE
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
