Clmification of the Public Water Supply of Cincinnati. 23 



whole to the top in a frothy mass which is removed liy skimming. 



The clarification of wines is produced by solution of pure 

 albumen or of dried blood, with the addition in some cases of 

 ground gypsum. The natural ingredients of the wine slowly co- 

 agulates the albumen which falls out carrying with it the solid im- 

 purities. 



Ferruginous Brines are readily settled by milk, eggs or blood, 

 the astringent oxide of iron and other minerals, acting as coagulat- 

 ing material, while the heavy oxide of iron quickly carries the 

 whole to the bottom. 



A. B. C. PROCESS FOR CLARIFYIMG SKWAGE' . 



Treat the Sewage collected in a quiet basin with a mixture of 

 Animal Charcoal, Blood and Clay. Then follow with a solution 

 of Per-chloride of Iron. The process will be hastened by the 

 addition of Alum. 



Recipes for the Clarification of Potable Water. 



1. By Crookes^ for precipitating the unhealthy water of the 

 Gold Coast, Africa: 



Calcium Permanganate (Ca MugOg) , . . i 



Aluminic Sulphate (Ala3So4i8H20) 10 



Fire Clay 3° 



2. From Hager^* for Turbid Water. 



0.5 Gramme, of Aluminic Sulphate (Al33So^i8H20) to a 

 Litre of muddy water. 



3. From Hager* Antiseptic: 



Aluminic Subsulphate, (3Al23So^2Al20y3H20). Teaspoon- 

 ful in 5 Litres of water. 



4. From Hager*, for Impure Turbid Water: 

 Aluminic Sulphate, (AI23SO4I8H2O) 5 Grammes. 



Dissolve in 100 c.c. of water and use for the clarification of 

 1000 Litres of turbid water. Follow by a solution of Permanga- 

 nate of Potassa, containing from 4 to 5 Grammes of the KMnO^ 

 to a Litre until it is no longer decolorized. 



In soft water the Aluminic Sulphate may be reduced up to 3.1 

 to the 100 c.c. for 1000 Litres of water. 



1. Chemical News, T, i86S. 



2. Chemical News, L iS6S. 



3. Pharmaceutische Praxis, I S. 201 and 262. 

 4 & 5. Pharmaceutische Praxis I, 262. 3S7. 



