A 



JOURNAL 



OF 



NATURAL PHILOSOPHY, CHEMISTRY* 



AND 



THE ARTS. 



SEPTEMBER, I8O9. 



ARTICLE I. 



On the Union of Tan and Jelly: by John Bostock, M.D* 



To Mr. NICHOLSON. 

 SIR, 



'URING the course of the last spring I was engaged in Purpose of the 

 a set of experiments, which may be considered as a conti- au ^ hoi ' s "** 

 nuatioa of those formerly made on the analysis of animal 

 fluids*. My object was to enable the operator to apply the 

 tests, which indicate the existence of the principal consti- 

 tuents of these fluids, albumen, jelly, and mucus, so as not 

 only to discover the qualities of the compound, but the' 

 quantities of its ingredients. The results of my experi- 

 ments have been, upon the whole, unsuccessful ; and I have 

 at present chiefly to announce the failure of the different 

 expedients, which I employed to attain mv object. It may 

 not, however, be altogether useless, to lay my experience 



* Sfie Journal, vol. IX, p. 244. 



Vol. XXIV. No. 106— Sept. 1809. B before 



