575 



No. I and tank No. 2. Tank No. i is a water-heater containing a 

 steam coil and vented by two large pipes connected with the flue. A 

 large amount of steam and gas is given off from the water escape 

 from this tank. Tank No. i is connected with tank No. 2 by a two- 

 inch pipe containing a valve which makes possible the draining of 

 one tank without draining the other. The water being withdrawn 

 from tank No. 2, flows from No. i to No. 2 and is boiled for a long 

 time in the latter, which measures 2X2X4 ft. and is supplied with a 

 six-inch vent in a large cover. The water leaves tank No. 2 at the left 

 through a dirt trap, No. 7, and passes through the floor to the room 

 below. The discharge line can be flushed with university water from 

 CW. The steam used is high pressure — usually 90 pounds — but may 

 be reduced to 25 or 30 pounds by a pressure-reducing valve, No. 8; 

 the steam traps. No. 6, remove the condensation. 



After passing through the floor the water goes through a cooler. 

 No. II, made from block-tin pipe (black iron return bends at the 

 ends) placed inside lyi" pipes connected with each other by cooler tees, 

 the cooling water flowing into the cooler at the point where the boiled 

 water leaves it. In the middle of the coil are three gas introducers 

 (12), which are modified beer air-purifiers made by Bishop, Babcock, 

 and Becker, the gas being introduced into the chambers, through which 

 the water flows, through blocks of basswood, thus dividing it into very 

 small bubbles. Oxygen, carbon dioxide, and nitrogen have been in- 

 troduced. 



The water is delivered "at the ends of a drain table. Tank No. 3 

 is used for securing water which is saturated with oxygen under 

 atmospheric conditions in quantity sufficient to run through a number 

 of bottles containing animals. Tank No. 4 is for aerating the univer- 

 sity water-supply by running it down crimped inclines and through 

 two chambers where the iron which is precipitated is removed. This 

 water is stored in tank No. 5. Two tanks like Nos. 4 and 5 are pro- 

 vided above tank No. 3, with the controlling float-cock in No. 3, so 

 that water may be partially aerated and delivered to No. 3, where com- 

 pressed air forced into it renders it very alkaline and saturated with 

 oxygen. The drain table is supplied with water from tanks Nos. 3 

 and 5 and from the university supply marked CW, and alsi^ witli 

 air (A). 



