396 Intelligence and Miscellanies. 
a cheaper rate, the ee water; the employment of 
which will then become m 
The method which I follows is a thie I take nitrate of ba- 
rytes, which I put into a porcelain retort, to which I lute a 
Welter’s tube, and extend the latter under an inverted jar 
of water. I then gradually heat the retort, and maintain it 
at a red heat, as Jong as any nitrous acid and azotic gases 
are disengaged, which indicates that a portion of nitrate of 
barytes remains to be decomposed; but from the moment 
that the oxygen gas passes perfectly pure, I remove the fire 
and let the retort cool. The product of this decomposition 
is a deutoxide of barium, which possesses all its known prop- 
erties, among which is that of slacking with water without 
being heated, of disengaging oxygen, when boiled in that 
fluid, and of being brought to the state of protoxide by a 
strong heat. Its purity is easily proved by treating it with 
sulphuric acid, for no disengagement of nitric acid ensues. 
ure nitric acid does not di isengage deutoxide of azo We 
may thus obtain a deutoxide of barium, as well ated with 
oxygen, and as pure, as that which is procured by the other 
process. Its formation is, in fact, very senanehs the protox- 
ide of barium, finding itself in contact with a great-quantity 
of oxygen gas in the nascent state, combines with it and re- 
tains it, if the heat be not too pret aioenente to disengage 
it— Annales de Chimie, Gc. Sept. 1 
57. Pre ecipitation of albumen by phosphoric acid.—Ber- 
zelius and Engelhart have discovered that phosphoric acid, 
prepared by os phosphorus in nitric acid, evaporating 
the solution in a platina vessel and heating it to redness, 
would, whew gfe eee in water, .precipitate both vegetable 
and animal albumen very abundant. = that the power of 
y. The cause of this nomenon, (Berzelins hana’ 
it was impossible to discover.—Idem 
