Travcrs. — Fighting Pollution in Ohio 285 



cided change in the water, driving away all the disagree- 

 able odors that were present before it was applied. The 

 control of the stench, as well as the poison, by this process, 

 is, in my opinion, very important. 



7. Straw-board factory pollution. This sample is taken 

 from the sewer of a straw-board factory at Cedarville, Ohio. 

 This firm puts 500,000 gallons of polluted water every day 

 into large retaining reservoirs twenty-five acres in extent, 

 and the longer it remains in those reservoirs, the more poi- 

 sonous it gets. The upkeep and maintenance of these 

 acres of reservoirs is quite expensive. This firm is arrang- 

 ing to convert them into chemical precipitation tanks, and 

 to use our process in treating the waste water. It is their 

 intention to use this water over again in their factory, not 

 allowing any of it to enter the stream. Government re- 

 ports, based on a number of tests conducted over a period 

 of three years, show that the residue from this kind of 

 pollution is of the same value as barnyard manure, making 

 the by-product a very important factor. 



'8. Natural copperas water pollution. This is a sample 

 of what is known as copperas water. It is very poisonous 

 to any stream into which it flows. Millions of gallons of 

 this kind of water flow naturally from the earth in places. 

 In order to show you how easy it is to eliminate organic 

 matter from polluted water and make it pure so that fish 

 can live in it, I will take a few drops of this copperas pol- 

 lution and put it into this tube of tannery waste. I will 

 now apply a very small amount of this marl which I will 

 shave from a lump of the material as it is taken from the 

 ground, and you will note that all the organic solids are 

 quickly removed, along with the odors. 



Discussion 



Mr. Dwight Lydell, Comstock Park, Mich. : Have you among your 

 samples any water from a sugar beet factory? 



Mr. Travers : No, but I visited the sugar beet factories at Toledo 

 and Paulding. They put out an immense volume of water, but this 



