RESEARCHES IN ANIMAL CHEMISTRY. 
153 
follow that the addition of chloride of soda to the nutriment 
of these animals is as necessary and indispensable for all 
places where the forage food does not contain either the 
phosphate or the other salts of soda, as is the case in many 
of the localities of Germany. 
We may easily conceive that the chloride of soda, by a 
reciprocal decomposition with the phosphate of potash 
(which predominates in our wheat grain, &c.) may furnish 
phosphate of soda and chloride of potash; and this latter 
salt is never deficient in the liquids of the flesh. 
Not to encroach on the time of the Academy, I will end 
my observations here, in referring for a more lengthy detail 
to a . pamphlet actually in the press. I shall only add that 
creatine, by a prolonged ebullition with very concentrated 
barytes water, separates itself into urea (or into carbonate 
of barytes and into ammonia,), into a new organic base, 
which forms a salt with sulphuric acid, which crystal- 
lises in pearly spangles resembling chlorate of potash, 
and into a new crystallisable acid, which 1 have not studied 
through want of a sufficient quantity. 
In terminating this paper I will mention some facts ob- 
served in my laboratory, and which I deem worthy of at- 
tention. 
M. Henneberg, one of my pupils, has found that the 
blood of fowl contains silicate of potash, or of soda, which 
explains the existence of the enormous quantity of silica 
remarked in the feathers of birds. 
M. Dorter Bensch, my preparer, has shown that the 
milk of the three bitches fed with milk during twelve, fif- 
teen, and twenty-seven days, contains sugar of milk per- 
fectly crystallisable. 
To conclude, M. Gngelberger, another of my pupils, has 
obtained by the distillation of casein or of gelatine with the 
peroxide of manganese and sulphuric acid, pure aldehyde 
and essence of bitter almonds, both in sufficiently large 
quantities to be able to demonstrate this remarkable fact by 
analytical results. — Chemist. 
VOL. XIII. — NO. II. 14 
