Clarification of the Public Water Supply of Cincinnati. 27 



Series 3. Hydrant Water. December 18, 1884. 

 Precipitant, Ferric Chloride Sol. Sp. Gravity 1.345. 

 I Drop=o.o22 G. 



Series 4. Hydrant Water. 



Precipitant, Hg SO 4. Did not clarify — Water Acid. 



Series 5. Hydrant Water. December 26, 1884. (Not satis- 

 factory.) 



Precipitant, Fe SO 4, and Hg SO; to strong Acidity, 

 o.oi G. Fe SO^ to the c.c. 



Series 6. Hydrant Water. December 28, 1884. 

 Precipitant, Alum. (Ammonia.) 



I c.c. of the Solution contained 0.066 G. (H^ N)^ Alg 4*S0^ 

 24H2O. 



Series 7. January 5 corrorborates Series 6. 



