125 



to crarking. The dam is mortised into tlie rock on both bottom and 

 ends, and is also anchored to tlie roclv by 1-incli steel bars, grouted into 

 the rock and extending well np into the daai. Reiiil'orcing bars of g-inch 

 section lap past these and extend to the top of the structure, being 

 spaced four feet apart. The center of the crest and of all ledges is one 

 foot lower than the ends, so that the water spills over the middle sec- 

 tion of the dam. The pump installation is a triplex Deming pump, driven 

 by a 25 H. P. Otto gasoline engine; and it works against a 220 to 240 

 foot stallc head. The writer is pumped one mile to a reinforced concrete 



Fig. 1. Indiana University dam. Cro.s.s-.section, showing dimensions, and distribution of rein" 

 forcing steel (a, b, c, etc., m-n, s-t. etc.). After a drawing by A. L. Folev. 



