360 
cient was obtained, but in nearly every case with grains, 
and their manufactured products, a smaller coefficient was 
obtained, as is shown by the following with two different 
corn meals. 
Per cent. digested, 
I I 
Pepsin digested... 06. .sesseee cee e ent etree ede beacons 70.25 73.10 
Pepsin and pancreatin digestion. .........+-+++.+esee sees 54.45 62.50 
After digestion with the pepsin the solution is decanted, 
a solution of commercial pancreation added and the diges- 
tion continued. Probably all of the digested albuminoids 
are not washed out of the substance before adding the pan- 
creatin solution and there seems to be a kind of saponifica- 
tion of portions of the meal with the pancreatin solution 
rendering the whole very difficult of filtration, hence it 
cannot be properly washed, and much of the otherwise 
digested nitrogenous portion is left on the filter. This has 
proved so grave a source of error that I have found it ad- 
visable, in my experiments, not to continue the digestion by 
means of a pancreatin solution, for, at best, there is but a 
slight increase in digestibility for any of the fodders, with a 
probability of decreasing the digestion coefficient in many 
concentrated feeds. 
THE DEGREE OF FINENESS. 
A sample of corn was ground to different degrees of fine- 
ness for digestion. The first quite coarse, the second as 
usually found for feeding and the third portion much finer. 
Per cent. 
. digested | 
@orn meal, Coarse... 0... 2s eee ee ee hee eal kee ee ee ce 52.10 
Gorn meal, ‘ordinary o/s ae 65.60 
Corn’ meal, fines ies ae keeles elias jel nan eae aie) al ety? ee 73.10 
A difference of twenty per cent. in digestibility between 
coarse ground meal and that ground fine. In one hundred 
ounds of the meal as fed, a difference of 1.71 pounds of 
digestible albuminoids. The same is probably true in ani- 
mal digestion and when properly fed a much larger per 
cent. of fine ground meal should be digested than of coarse 
ground. The animal does not further masticate the meal 
but moistens it with saliva enoygh to permit of its being 
swallowed, when it at once passes into the digestive tract 
and when coarse, the digestive fluids of the stomach must 
fail to penetrate through the particles so fully. Especially 
this seems true of the meal made from the flint corns. 

