An elementary laboratory study in soils elementarylabora01jeff Year: 1908 24 DEPARTMENT OV PUBLIC INSTRUCTION. 6. Repeat the addition and packing of soil described in 5 nntil each jar is rounding full. 7. When the jars have been thus filled, strike off each surface even with the rim of the jar, using a straight-edge. 8. Set jars number 1 and number' 6 to one side. 9. Set the gauge so that the blade shall extend one inch below the edge of wood frame and with gauge and scoop remove the soil from the sur- face of number 2 and number 5 to the depth of one inch, placing the soil in the pan. Thoro
An elementary laboratory study in soils elementarylabora01jeff Year: 1908 24 DEPARTMENT OV PUBLIC INSTRUCTION. 6. Repeat the addition and packing of soil described in 5 nntil each jar is rounding full. 7. When the jars have been thus filled, strike off each surface even with the rim of the jar, using a straight-edge. 8. Set jars number 1 and number' 6 to one side. 9. Set the gauge so that the blade shall extend one inch below the edge of wood frame and with gauge and scoop remove the soil from the sur- face of number 2 and number 5 to the depth of one inch, placing the soil in the pan. Thoroughly crumble wjth the hands the soil thus re- moved and return to the jars. This will fill the jars rounding full again. Tap lightly. Then with straight-edge strike off each surface even with rim of jar. Carefully set jars 2 and 5 aside. 10. Set the gauge so that the blade shall extend two inches below edge of wooden frame, and with gauge and scoop remove the soil from surface of jars number 3 and number 4 to the depth of two inches, placing the soil in the pan. Thoroughly mix and return to jars, tap jars and strike off as in 9. Note—Observe that we have secured in jars 2. 5, 3 and 4 what we secure in the field by cultivat- ing one inch and two inches deep respectively. In the jars, however, we have secured much greater uniformity of both depth and stirring of soil. 11. Add i pound of water to each jar through the tube or funnel. 12. Weigh and record weight of each jar in order. (See Fig. 11.) Fig. 11. Showing jars as they appear when filled in Experiment XI. One of the jars rests upon platform of the kitchen balance. 13. Place the six jars in order in some place sufficiently sheltered to pro- tect from rains and birds. 14. At the end of one week weigh each jar, record weight and add water through the tube or funnel sufficient to bring the jar and contents up to the original weight. Note—To bring up to weight leave the jur on scale and add water lliiuugli tube or funnel
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