New Ways TO USE LIQUOR HYPOPHYSIS 211 
uterus half an hour after expulsion of the placenta 
these will be prevented. 
Precaution: Although pituitary extract is harmless 
in any ordinary amount in sleep, it should not be given 
by hypodermic to the pregnant when they are awake 
for fear of causing tetany. [Note: Many observers 
have remarked that the physiological action of Liquor 
Hypophysis (U.S.P.) is directly opposed to that of 
morphine and chloroform, and vice versa.—H. R. H.] 
Addendum: In twenty cases I induced labor with 
happy results to baby and mother by insufflating pow- 
dered posterior pituitary substance up the nose, and 
then holding the tip of the finger against the external 
os for several minutes. In a few cases I found it neces- 
sary to hook the finger over the internal os. 
