1817.} Scientific Intelligence. 249 
It would appear, therefore, that the vulpinite is merely an anhy- 
drous sulphate of lime. 
X. Discovery of the Ewistence of Cobalt in Meteoric Iron. 
The existence of nickel and chromium in meteoric stones has 
long been known; and an experiment of Klaproth (Beitrage, vi. 
297) leads to the suspicion of the existence of cobalt in the same 
minerals. ‘The existence of cobalt in the meteoric iron from the 
Cape of Good Hope has been ascertained by Professor Stromeyer, 
who lately analyzed a specimen of it sent him by Mr. Sowerby. 
He was unable to detect cobalt in the meteoric iron from Siberia 
and Bohemia; but he considers the methods at present used to 
separate cobalt from nickel as bad, and he has not yet discovered a 
better. 
XI. Death of Klaproth. 
On Jan. 1, 1817, Martin Henry von Klaproth, Professor of - 
Chemistry at Berlin, and by far the most celebrated chemist in 
Germany, died at a very advanced age. He has been a distinguished 
writer for at least 40 years ; for he published a set of chemical ex- 
periments on copal in the year 1776. Chemistry lies under greater 
obligations to him than to any other chemist of his time. He de- 
voted himself entirely to analytical chemistry ; and to him we are 
chiefly indebted for the knowledge which we at present possess of the 
mineral kingdom, and for the formulas employed to develope the 
constituents of minerals. His labours are consigned in six octavo 
volumes, under the title of Beitrige zur chemischen Kenntniss der 
Mineralkorper, the first volume of which was published in 1795, 
and the last in 1815. He was the discoverer of uranium, and he 
confirmed and completed the discovery of tellurium and titanium. 
He likewise discovered zirconia and mellitic acid. 
XII. Diabetic Urine. 
(To Dr. Thomson.) 
SIR, Bedford-square, Feb., 1817. 
If you, or any of your correspondents, will in your next number 
treat on the most effectual method of analysing diabetic urine, it 
will much oblige, 
Yours respectfully, 
i 
I think my correspondent cannot do better than study the expe- - 
riments of Nicolas in the Annales de Chimie, xliv. 32, those of 
Sorg in Gehlen’s Journal, vi. 9, those of Dupuytren and Thenard 
in the Annales de Chimie, lix. 41. He will find it useful to peruse 
the experiments of Fourcroy and Vauquelin in the Annales de 
Chimie, xxxi. 48, and Berzelius’s paper on animal fluids published 
in the Annals of Philosophy, ii. 19, &c. If he understands 
