PRICES. 3/3 



The resulting ash was white, alkaline, effervesced on the addition 

 of an acid, and contained : 



Tribasic phosphate of soda (a little). 



Chloride of sodium. 



Alkaline sulphates. 



Phosphates of lime and magnesia (in abundance). 



Carbonate and sulphate of lime. 



Phosphate of iron (a trace). 



B. Another portion of the same excrement was extracted 

 with water, and the brown, alkaline solution evaporated on the 

 water-bath. 



During the process of evaporation there was formed on the 

 surface a tenacious, yellowish-brown film, which, when removed, 

 was speedily replaced. 



a. One half of the evaporated aqueous extract was incine- 

 rated. The ash was very alkaline, effervesced briskly on the 

 addition of an acid, and contained : 



Alkaline carbonates. Alkaline sulphates. 



Alkaline phosphates. Chloride of sodium and earthy phosphates. 



b. The other half of the evaporated aqueous extract was treated 

 with alcohol, which assumed a tint varying from a red to a 

 green, and had an alkaline reaction. On evaporating the al- 

 coholic solution, an alkaline ash was obtained, consisting, for 

 the most part, of tribasic phosphate of soda and chloride of 

 sodium. 



The membrane and other matters not taken up by alcohol, 

 yielded a neutral ash consisting of phosphates of lime and 

 magnesia, with traces of chloride of sodium and alkaline phos- 

 phates. 



c. The portion of excrement not taken up by water, yielded 

 a neutral ash consisting of : 



Phosphates of lime and magnesia. 



Sulphate of lime. 



Traces of chloride of sodium and alkaline phosphates. 



With a solution of baryta, the alcoholic solution yielded a 

 very bulky, yellowish-green precipitate ; and, on the addition 

 of basic acetate of lead, there was a considerable sediment so- 

 luble in acetic acid, decolorization of the fluid, &c. ; hence un- 

 changed choleate of soda was present. The occurrence of this 

 constituent was, however, by no means invariable ; and, gene- 



