1817.] during the Year 1816. 55 
XY. ANIMAL BODIES. 
1. Membranes.—Dr. John has published a chemical analysis of 
the membranes of different parts of the body, of which I inserted 
a translation in the Annals, vii. 419. The results were as follows :— 
(1.) Epidermis of the foot. It was composed of 
Tndurated albumen. \ .2ehs.0/s.c dic s/s)s-< o0 wes, 99 tOl9d 
Mucus, with a trace of animal matter ...... oa a 
Lactic acid 
Lactate of petash 
Phosphate of potash 
Muriate of potash i 
Sulphate of lime eeeeeseeoe ee sec e oeee ee ee 
Ammoniacal salt 
Phosphate of lime 
Manganese? and iron 
BA ie hye acs: sinha Sabie selmi ie gt 9 ats jae atta O°OR 
(2.) Epidermis from the pie of a Woman afflicted with Herpes 
was composed of 
Indurated albumen ........... casesvees 92° to 93 
Mucus, becoming insoluble by evaporation, 
and gelatinous mucus, precipitated by} eit ree f 
nutgalls 
Lactic acid, and the above stated salts...... 1 
Og so epideaia SERIE AAT EN gs 
(3.) Horns of Black Cattle were ab ohh of 
Indurated albumen’ ............026: ieee! ‘90 
Gelatinous albumen with osmazom?.......... 8 
Lactic acid 
Lactate of potash 
Sulphate, muriate, and phosphate of potash 
— 
Phosphate of lime 
Trace of oxide of iron 
Ammoniacal salt J 
Fat.. eeeeeee oereeee ee eer eee eee ee eee . 1 
(4.) Hoofs of Horses possess all the characters of horn. 
2. Sugar of Diabetes. —Chevreul, by concentrating diabetic 
urine, and setting it aside, obtained the sugar in small crystals. 
These being dissolved in boiling alcohol, the liquid deposited white 
crystals of the sugar. It possessed all the properties of the sugar of 
grapes. Its crystals have the same shape; it is equally soluble in 
water and alcohol with that sugar; and, like it, melts when exposed 
toagentle heat. (Ann. de Chim. xcv. 319.) 
3. Colouring Matter of the Blood —Some years ago Mr, Brande 
published an important paper on the blood, in which he demon- 
strated, by decisive experiments, that the colouring matter of that 
fluid was not subphosphate of Tron, as had hitherto been supposed, 
