. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 10 T. Lyttleton Lyon and James A. Bizzell cone. Between this cone and the sand in the tank, gravel is placed to support the sand and facilitate drainage. The cap, the rod, and the cone may all be removed if the outlet becomes clogged, but it has never been necessary to do this. From the lower side of the drainage tube a smaller tube projects, and ov
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). 10 T. Lyttleton Lyon and James A. Bizzell cone. Between this cone and the sand in the tank, gravel is placed to support the sand and facilitate drainage. The cap, the rod, and the cone may all be removed if the outlet becomes clogged, but it has never been necessary to do this. From the lower side of the drainage tube a smaller tube projects, and over this is drawn a rubber tube to conduct the water to the receptacles in the tunnel. The drainage, water is caught in galvanized iron cylinders, of which there are two for each tank. One cylinder has a side tube near the top which fits into a hole in the one next it, so that when the first cylinder becomes full the water may flow into the other. The cylinders are of such a diameter that each centimeter in depth represents 800 cubic centi- meters of volume, and each cylinder holds about 60 liters. The drainage is measured by running a meter stick into the cylinder and measuring the height of the water. The volume is then easily computed by multiplying the number of centimeters of depth by 800, to get the number of cubic centi- meters. An aliquot sample is then removed and the remainder of the water is allowed to run off thru a faucet in the bottom of the cylinder. The waste water is conducted by gutters in the tunnel to drains which carry it away. The samples for analysis are placed in milk cans lined with paraffin. An anti- septic is always kept in these sample cans. The soil used. Fig. 3. vertical sec- tion OF drainpipe Tanks 1 to 12, which were the ones used in this experiment, were filled during the summer of 1909 with soil from Caldwell Field on the university farm, the soil being excavated to a depth of 4 feet in layers of 1 foot. These layers were placed in the tanks in
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