16 M. Berzelius’s Analysis of the Ferruginous 
the highest prudence, and of the most tender devotion to his 
people, have not been able to preserve from so many calamities. 
His courage could not withstand the sight of the sufferings of 
his master and of his country, and the distresses of his heart 
produced in him a complication of diseases, to which no care 
could afford relief. He died in the arms of his sister, on the 
30th of June 1817, .at Dresden, whither he had gone in the 
hope of some mitigation of his sufferings. 
It seems as if fortune had conducted him to that capital, that 
he might there receive more solemn honours. The most illus- 
trious personages of the kingdom assisted at his obsequies. M. 
Boettiger, a distinguished philosopher, publicly pronounced his 
funeral oration. The most celebrated academies of Germany 
have paid him the same tribute which we are paying to him this 
day, and which will be decreed to him, under one form or 
another, in every country of the world in which any of the 
branches of the sciences of the Earth is cultivated. 
Art. II . — Accounf of the Recent Chemical Researches of M, 
Berzelius and his Pupils, In a Letter to Dr Brewster 
from a Correspondent in Stockholm. 
1 . Account of Berzelius'' s Analysis of the Ferruginmis and 
Sulphuretted Prussiates. 
IVX* Berzelius has lately been engaged in examining the 
ferruginous and the sulphuretted Prussiates, the composition of 
which has for some time past become so interesting, from the 
different, and in general improbable, results, which several che- 
mists, such as Porret, Thomson, Bobiquet, Von Grotthus, and 
Doebereiner, have deduced from their experiments. From his 
analysis of the ferruginous Prussiates, M. Berzelius draws the 
conclusion, that they are true double prussiates, with two bases, 
of which the protoxide of iron is always one ; whilst the other 
base, which may vary, contains constantly as much oxygen as 
the protoxide of iron. The ferruginous prussiates of potash, 
barytes, and lime, have the property of efflorescing in heat, as 
well as in a vacuum at the ordinary temperature of the at- 
