Osmotic Pressure Exerted by Fat. 
71 
receive such infusion. Of the 11 dogs which received Ringer's 
solution 6 died on the table and 2 died a few days later. Of the 
10 animals which did not receive Ringer's solution, 7 survived, 
two died on the table and one died about 12 hours later. While 
when using ether the intravenous infusion was a definite favorable 
factor, it proved to be definitely unfavorable when chloroform 
was employed. Finally in nearly all the chloroform cases the 
autopsy revealed pathological conditions, either of the lungs or of 
the kidneys or of both. The acute deaths were brought about by 
pulmonary disorders accompanied mostly by pulmonary oedema. 
When using the intratracheal insufflation there is no doubt 
that ether is a safer method than chloroform, at least in the treat- 
ment of strychnine poisoning. 
41 (566) 
A demonstration of osmotic pressure exerted by fat. 
By JACOB ROSENBLOOM and WILLIAM J. GlES. 
[From the Laboratory of Biological Chemistry of Columbia University, 
at the College of Physicians and Surgeons, New York.] 
In the first of two demonstrations, the authors lowered a 
cylindrical rubber bag, one and one half inches in diameter and 
eight inches long, into an oiled muslin bag of about the same 
dimensions. The rubber bag was then filled to overflowing 
with olive oil. The rubber bag expanded, as the oil filled it, 
to the full length and width of the muslin sheath. The sheath 
prevented further extension of the rubber bag and imparted 
rigidity to the osmometer that was ultimately constructed. The 
full double bag, with its mouth wide open, was then raised 
so as to enclose about an inch of the lower end of a long glass 
tube which was firmly supported vertically above the demon- 
stration table. The glass tube was 5 feet long and its bore was 4 
mm. in diameter. Ligatures were tightly secured around the neck 
of the double bag against the immersed lower end of the vertical 
tube. The bag then hung directly from the end of the tube. The 
bag and its sheath were in a tightly distended condition and a station- 
