( 98 ) 

 fectant powder. All similar matters, contain- 

 ing carbon and organic matters, such as the 

 debris of peat, wood, saw-dust, tan and the 

 like, are perhaps equally appropriate to this 

 purpose. 



A mixture of an argillaceous earth, with a 

 tenth of its weight of some organic matter, 

 faecal matters for instance, after being calcined 

 and crushed between channelled rollers and 

 bolted, is a very suitable disinfectant. 



Salmon used this powder with success in 

 disinfecting the faecal matters of privies, 

 which by admixture therewith became pul- 

 verulent, and consequently of easy removal. 

 The proportions are 25 gallons of powder 

 to 25 gallons of faecal matters. As soon as 

 the incorporation is completed, all disagreea- 

 ble odor disappears and the organic matter is 

 transformed into a very energetic manure, 

 and with the great advantage of being nearly 

 dry, pulverulent and of easy transportation. 

 This process was not applied by the inventor 

 to the disinfection of the faecal juices. 



Derosnes's process of disinfection consists in 

 the immediate separation, in the sinks, of the 

 solid from the liquid portion ; in adding, at 

 each visit to the privy, a disinfecting powder 



