RECES. 387 



analysis it appeared that 100 parts of the solid residue of this 

 evacuation were composed of: 



Analysis 153. 



Green fat containing cholesterin . . .10-0 



Salivary matter soluble only in water, and slightly precipitated by 



tannic acid and acetate of lead . . . 24'3 



Bilin with bilifellinic acid and biliverdin, collectively soluble in 



anhydrous alcohol . . . . 21 '4 



Extractive matter soluble in spirit . . ll'O 



Albumen, mucus, and epithelium-scales . . .17*1 



Salts ...... 12-9 



100-0 



Various attempts that I made (by Smithson's method) to 

 detect mercury in calomel-stools proved unsuccessful. 



[Dr. Golding Bird has published an analysis of the green 

 evacuations so frequently observed in children. The specimen 

 examined by him " was passed by a hydrocephalic infant whilst 

 under the influence of mercury, and presented the following 

 characters. It was a dirty- green turbid fluid which, by repose 

 in a glass vessel, separated into three very distinct portions; 

 1, a supernatant fluid, of oil-like consistence, presenting a 

 brilliant emerald-green colour; 2, a dense stratum of mucus, 

 coagulated albumen, and epithelial debris, mixed with red par- 

 ticles of blood ; 3, a deposit, occupying the lower part of the 

 vessel, of large crystals of ammoniaco-magnesian phosphate, in 

 fine prisms of an apple-green colour. 



The supernatant emerald-green fluid was decanted for 

 examination. 



A. It was faintly alkaline, possessed a broth-like odour, and 

 a density of 1020. 



B. The addition of a few drops of nitric acid did not alter 

 the colour, even after ebullition. A larger quantity of the acid 

 being added whilst the mixture was boiling, converted the 

 emerald-green colour into a pinkish-yellow ; the green colour 

 was not restored by the subsequent addition of an alkali. 



c. Acetic acid scarcely affected the green fluid, producing 

 no apparent coagulation of mucus. 



D. A solution of acetate of lead threw down a copious 

 grayish-green, tenacious precipitate, leaving the supernatant 

 fluid colourless. 



