ts 
( 393 ) 
more fat is resorbed from emulsions with solutions of soap then 
from emulsions with Na, COs. 
In order to answer this question, a loop was produced from 
the large intestine and by means of a string tied round it, 
divided into three parts, of equal length. Into the central part > a 
lipanine-Na, CO;-emulsion was introduced, into a lipanine-soap- 
emulsion. The two emulsions contain 20 cc lipanine to 80 ce 
emulgent fluid (soapsolution 5 °/) and Na, COs-solution !/, P/,). 
The piece of intestine c serves as a control and does not contain 
anything. 
Five hours afterwards the intestine is eliminated. On opening 
there is no trace of emulsion to be observed; this section is empty, 
but a mass of fat is found lying against the mucosa. In a there is 
still a fine emulsion present; of a fatty mass or of drops of fat 
against the mucosa there is no trace. 
The contents and mucosa of the two sections are taken in hand 
for the quantative examination of the fat still present. 
The mucosa is also removed from the controlling section ¢ and 
its fateontents determined; but before proceeding to the last, we add, 
in order as much as possible to avoid mistakes the same quantity of 
lipanine-soap-emulsion as was injected into a in this case, thus, 
20 ce. 
The first experiment showed that from the lipanine-soap-emulsion 
0.558 Gr. of fat had been resorbed, whereas, in the same time, 
only @.456 Gr. of fat had been resorbed from the lipanine-Na, COs- 
emulsion. 
Further experiments yielded the same results. 
Though it had hereby become certain that more fat is resorbed 
from lipanine-soap-emulsions than from lipanine-Na, CO;-emulsions 
and the power of the large intestine to resorb fat has hitherto been 
rated too low, yet, in order to form an idea of the resorbing power 
of the large intestine, it seemed desirable to compare it with that 
of the small intestine. 
In making this comparison, the necessity of reducing the extent 
of the resorption to equal surfaces of mucous membrane, presents 
no little difficulty. If, however, in preparing the mucosa we make 
a circular incision which penetrates to the mucosa, and then strip 
off serosa with muscle from the mucous membrane, it is very easy 
to ascertain the surface of the mucosae of the two pieces of intestine 
to be compared. 
The experiments have now shown that, for fat, the resorptive 
