Bauhaus-Universität Weimar

Reports of Visits to Foreign Laboratories, vol. 1 (1907) [Illustrated Typoscript in 7 volumes] Reproduced with the kind permission of Dr. Cecil E. Leith
Benedict, Francis Gano
activity and net the work of digestion, experiments should show 
some difference with smaller amounts of food trat not necessarily 
in proportion. 
In discussing the muscular activity of the dogs, Prof. Cohn- 
heim says that Putner's apparatus has a so-called volumeter which 
should indicate restlessness on the part of the dog, as it indi¬ 
cates variations in the volume of the air inside the chamber. 
As near as I can make out, the dog is in the bulb of a large 
air thermometer and any restlessness would cause an increase in 
the volume of air by virtue of the increased heat production. 
Muscle .juices.—By means of the Kossel cutting machine ~nd 
the saefte presse of Juchner has obtained 60 per cent of fresh 
muscle in a clear juice without the addition of any water. Prom 
liver he obtained but 40 per cent. 
Woman with a Pawlow fistula.—Br. Bickel in Berlin has a 
v;oman who has a Pav/low fistula who would be willing to come to 
America for experiments on artificial feeding if paid. She may 
prove a second Alexis 3t. Martin. 
Heat of hydrolization of proteins.—Prof. Cohnheim thinks 
that the heat of the hydrolization of the proteins is very small, 
perhaps three or four per cent. The main thing in protein 
metabolism is the oxidation of the amino acids. If we feed meat 
extract, we should have no hydrolization to speak of as the meat 
extract is to a large extent, at least, excreted unchanged. 
(I called his attention to Prof. Folia’s claim that under 
certain conditions, creatine was retained in the body.) Prof. 
Cohnheim thinks that the small amount of meat extract used played 
no role in the true digestive process and the experiment should be


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