F.XPKllIMKNTS OX DIGESTION. 
*205 
that had no action on the turnsol. The upper portion of the 
small intestine of a dog that had been fed on bread and milk con¬ 
tained a white and frothy houillie, which feebly reddened the 
turnsol. In the inferior portion was a small quantity of yellow 
liquid, with cylindrical masses of a clear brown colour. In a dog 
that had taken animal food there was a bouillie like starch, foetid, 
and without any action on turnsol. In another dog that was fed 
in the same way there was the same houillie, but it had already 
began to assume a cylindrical form at the lower part, and did not 
redden the turnsol. The duodenum of the dog that was destroyed 
after being fed on spelt-bread, with cooked beef and milk, and in 
which Ave had not only tied the ductus choledochus, but had also 
separated it from the duodenum, there Avas a pale red fluid, with a 
great quantity of mucous flocculi, moderately large, Av^hite, and 
opaque. These flocculi perfectly resembled those Avhich some 
physiologists have regarded as chyle precipitated from chyme by 
the action of the bile which mingled with the latter. The neigh¬ 
bouring portion of the small intestine presented a thick liquid, con¬ 
taining similar mucous flocculi, and the whole strongly reddened 
the tincture of turnsol. The inferior extremity of the small intes¬ 
tine contained a yelloAvish-broAvn and nearly transparent liquid, 
mingled with mucous flocculi and bubbles of air, Avhich feebly red¬ 
dened the turnsol. Not far. from the insertion of the ileum into 
the caecum, Ave found hardened excrement of a greyish-Avhite colour, 
mucous, and having a peculiarly foetid smell. 
The matters found in the small intestines Avere, 1, Little, or, for 
the most paert, no free acid. Where it existed, but still in a small 
portion, was in dogs that Avere fed on bread and milk Avith a little 
water. 2, A great quantity of albumen, the presence of Avhich pre¬ 
vented us from recognizing Avhether there existed any caseous mat¬ 
ter, or matter precipitable by the chloruret of tin. 3, A matter that 
was coloured red by the chlorine, and Avhich Avas found in the two 
dogs referred to in No. 1, and in another that likeAvise Avas fed on 
bread and meat; but no portion of it having reached the small in¬ 
testine, it is impossible to attribute the red colour of the intestinal 
fluid, produced by the chlorine, to any mixture of it with bile. 
4, A sebaceous matter extracted by alcohol, and an acid similar to 
the margaric, substances that might proceed from the fatty matters 
which were given to some of the dogs. 5, Finally, the salts ob¬ 
tained by the incineration of the filtered liquors Avere, a great quan¬ 
tity of the carburetted, phosphuretted, and chloruretted alkalies, verv 
little of any sulphuretted alkali, and some calcareous salts that were 
not examined. 
It results from this, that the contents of the small intestines, ex¬ 
cept in the absence of the principal constituents of bile, did not 
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