32 ORGANIC CONSTITUENTS. 



The extractive matter is thus separated into three distinct 

 parts : these are — 



A. That which is soluble in water^ but not in dilute alcohol : 

 water-extract. 



B. That which is soluble in water and spirit, but not in an- 

 hydrous alcohol : spirit-extract. 



C. That which is soluble in water, in spirit, and in anhydrous 

 alcohol : alcohol-extract. 



A. The water-extract contains : 



o. Constituents precipitahle by tannic acid : 



(a) A matter not precipital)le by neutral acetate of 



lead, but by basic acetate of lead and bichloride 

 of mercury. 



(b) A matter precipitahle by neutral and basic acetates 



of lead, and by bichloride of mercury. 

 j3. Constituents not precipitahle by tannic acid : 



(c) A gummy matter not precipitahle by neutral 



acetate of lead, or bichloride of mercury, but by 



basic acetate of lead. 

 {d) A matter freely precipitahle by basic acetate of 



lead, and very slightly by neutral acetate of lead, 



and bichloride of mercm*y. 

 [e) A matter precipitahle by neutral and basic acetates 



of lead, but not by bichloride of mercury ; the 



Zomidln of Berzelius. 



B. The spirit-extract contains : 



a. Constituents precipitahle by tannic acid : 



{a) A matter not precipitahle by neutral or basic acetate 

 of lead, but bv bichloride of mercurv. 



(b) A matter not precipitahle by neutral acetate of 



lead, or bichloride of mercury, but by basic 

 acetate of lead. 



(c) A matter precipitahle by neutral and basic acetate 



of lead, but not by bichloride of mercury. 

 (5. Constituents not precipitable by tannic acid : 



(d) A matter rather indifferent toAvards reagents. 



{e) A matter discovered and described by Chevreul ; 

 Kreatin. 



