Aiiicrirdii Fishcrii's Socid 



23: 



ated nv even ovci'-saturatcd witli tlic uas. 1 giwo several in- 

 stances of this process in my addi'ess last year and need not re- 

 peat them at this time. 1 o-ive the diau-ram of Elkhart Lake 



KlG. 1. — Elkhart Lake Aug. 2\ 19U5 



This diagram represents the condition of Elkhart Lalce with 

 respect to temperature and oxygen. The vertical spaces represenc 

 meters of depth. The horizontal spaces represent two things: (1) 

 degrees centigrade, as indicated by the temperature line (T — T); 

 and (2) cubic centimeters of oxygen per liter, as represented by the 

 oxygen line (0 — 0) : or the oxygen is indicated as partS per thousand. 

 by volume. It is easily seen that the temperature of the water be- 

 gins to fall rapidly at about G m. and that the oxygen begins to rise 

 rapidly at that depth, reaching a maximum of more than 10 cc. at S 

 m., and decreasing from that depth. A very important addition is 

 made to the oxygen stock of the lake by this manufactured gas. 



