PRICES. 377 



absent, as, for instance, bile; or, lastly, substances which are 

 altogether foreign to the normal secretions, are mixed with the 

 faeces, as albumen, blood, &c. 



In the case of diabetes alluded to in p. 296, I carefully ex- 

 amined the faeces. They contained no sugar, and were chiefly 

 remarkable for their large amount of solid fat. Two or three 

 pultaceous stools, averaging collectively 18' 5 ounces, were passed 

 daily. They gave off a very disagreeable odour, and were of a 

 grayish clay colour. 



Alcohol digested with this faecal matter became coloured 

 brown, and extracted a large quantity of fat, extractive matter, 

 and a little bilin. On treating the portion insoluble in alcohol 

 with water, a small amount of water-extract, almost devoid of 

 taste, was taken up. The insoluble residue yielded, on incine- 

 ration, an odour of burned horn or glue, and contained a large 

 amount of nitrogen. 1 A quantitative analysis showed that the 

 18-5 ounces of faecal matter contained : 



Analysis 15J. 

 Whole quantity. In 100 parts. 



oz. grains. 



Water . . . 12 312 



Solid constituents . . .5 408 



Fat . . .20 34-0 



Bilin and extractive matter soluble in "I ARC on 



alcohol 2<0 



Water-extract 



Alkaline salts . . 



Carbonate of lime 



Earthy phosphates and peroxide of iron 



Insoluble nitrogenous matters 



56 2-0 



1821 6-5 



70 1 364 2-5 



112J 4-0 



2 359 47-0 



I have attempted, in accordance with the plan laid down in 

 the appendix to Liebig's { Animal Chemistry,' to compare the 

 amount of carbon, nitrogen, and hydrogen in the food and in 

 the excretions. 



The ingesta consisted of: 



8 oz. of dry gluten bread. 

 11*5 dry meat. 

 2 dry egg. 

 2 cod-liver oil. 



23*5 ounces. 



1 [This is entirely opposed to the experience of Lehmann, who states that the faeces 

 of diabetic patients frequently yield a mere trace of nitrogen. Lehrbuch der physio- 

 logischen Chemie, 1842, p. 312.] 



