20 G. F. Barker—Physiological Chemistry. 
contained in it. It should be stated that considerable diffi- 
culty was encountered in filtering the chromite of magnesium 
precipitated by caustic soda, especially in those cases where a 
cos glam large proportion of chromium remained dissolved 
n the excess of soda, for hydrate of chromium is gradually de- 
pheftell from such solutions even in the cold. Toward the 
close of the filtration a certain portion of the chromium, which 
was dissolved at first, is in this way pss agelo upon the filter 
and added to the mass of chromite of magnesiu 
The foregoing experiments were undertaken at t the suggestion 
of Prof. F. H. Storer, by whom my attention was called to the 
subject in the autumn of 1867. 
Boston, May, 1868. 
Art. IV.—WNotices of papers in ria degre eccusshnss 
No. II; by Georcz F. Barker, M.D 
5. On the formation of Sugar in the liver. 
(Continued from vol. xlvi, p. 390.) 
(25) On the 23d of March, 1857, BerNarp announced to 
the gress wa hid the isolation of the glycogenic matter. His 
nenenanen which was altered <= cooking, and that the latter 
could be separated from the ferment by era in hot water. 
His tere for its preparation is as follows: The liver from 
course se used) is divided while still warm, into fine shreds, 
which are thrown into water in active ebullition, to coagulate 
the ferment. The mass is then bruised in a mortar, mixed 
with | a span) aeeatity of water, Soaps boiled for ? of an hour. 
