ne ne eet oer te en ae 
oe 
G. F. Barker—Physiological Chemistry. 263 
unexpected result was obtained ; he found that among the 
ruminants, while the vascular portion of the placenta—repre- 
sented by the multiple cotyledons—accompanies the allantois 
and spreads out upon its external surface, the glandular por- 
tion of this organ is separate from it, being developed upon the 
internal surface of the amnion. In rodents therefore, and in 
_« the liver is developed and its cellules begin to secrete glycogenic 
é 8 
These 
. On boiling 
mass in water and precipitation by alcohol, this substance is 
obtained, exactly as in the case of liver-tissue. The glycogenic 
matter thus prepared from the amnion has the most perfect. 
identity with that made from the liver; it dissolves in water, 
is t 
solution, from which it is thrown down by 
ss a milky ) 
. alcohol and by glacial acetic acid ; iodine colors it an intense 
ine-red,—_the color disappearing by heat and reappearing 
When cool—and it changes inte dextrin and fermentable 7 
following-are the conclusions reached by his researches : 
there exists in the placentas 0 a a function now 
e func- — 
f mamma 
“Qnounced, which appears to supplement the glycogem 
