THE FORMS OF SOIL-WATER 



181 



At Cornell University 1 a series of cement tanks sunk in 

 the ground have been constructed. Each tank is about four 

 feet and two inches square and about four feet deep. A slop- 

 ing bottom is provided, with a drainage channel opening into 



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Fig. 33. — Cross section of the lysimeter tanks at Cornell University, 

 Ithaca, New York. Each tank is one of a series, one tunnel serving 

 the two rows. Dimensions are given in feet and inches. Soils under 

 investigation (a), outlet (p), can for catching drainage water (c) 

 and sky-light (w). 



a tunnel beneath and at one side. As the tanks are arranged 

 in two parallel rows, one tunnel suffices for both. (See Fig. 

 33.) The sides of the tanks are treated with asphaltum in 



1 Lyon, T. L., Tanks for Soil Investigation at Cornell University ; 

 Science, N. Ser., Vol. 29, No. 746, pp. 621-623, 1909. 



There are other types of lysimeters. See, for example, Mooers, C. A., 

 and Maclntire, W. H., Two Equipments for Investigation of Soil Leach- 

 ings: I. A Pit Equipment. II. A Hillside Equipment; Tenn. Agr. Exp. 

 Sta., Bui. Ill, 1915. 



Maclntire, W. H., and Mooers, C. A., A Pitless Lysimeter Equip- 

 ment; Soil Sci., Vol. XI, No. 3, pp. 207-209, Mar., 1921. 



