Dr. blagden's Hiflory of 
and Profeflbr bkaun died the following year. Thefe two trea- 
dles contain the fubftance of all his obfervations ; but feveral 
* 
further particulars, relative to the difcoverv, may be collected 
from the Philoibphical Tran fa ft ions *, the Hillory of the 
French Academy of Sciences 4 -, and other literary publications 
of that period. 
§ 2. ProfeCor braun, in his fir ft diftertatiou, exprefted a 
very commendable wifh, that the experiment of congealing 
quickfilver might be repeated in other countries, and laments, 
in the fupplemerrt, that nothing of this kind had been done- 
It was not, however, till the year 1774, that his aflertions 
received any fort of confirmation out of Ruffia, and then by 
a mode of experiment which did not feem to promile much 
fuccefs. M. joiin Frederic blumenbach, then a ftudent 
of Phyfic at Gottingen, now Profeflbr of Medicine in the fame 
Univerfity, obferving the intenfe cold that prevailed there in 
the month of January that year, took the opportunity of ex- 
poling fome quickfilver to its addon. As the original account 
of this experiment was given only in a fingle number of die 
Idterary Journal of Gottingen j, in the German language, I 
will here tranflate it as exactly as pothble, leveral of the cir- 
cumfrances being very remarkable. 
“On the 1 1 th of January,” fays M. elumenbach, “ at 
“ half after five in the evening, I put three drams of quick- 
“ filver in a fmall lugar-glafs, and covered it with a mixture of 
“ equal parts of fnow and Egyptian fal ammoniac. This mix^ 
“ tu r c wa3 put loofe into* the glafs, fo that the quickfilver lay 
* Vol. LI. p 670. 
f Hift. del’Academie des Sciences, 1760, p. 26. 
| Gottiugifche Anzcigen von gelehrten Sachen. Stud; 13. Jan. 29, 1774. 
** perfectly 
