ENOS WALTER. 
76 
In Table V the first period has reference to the time cov¬ 
ered by the three milkings immediately prior to dehorning, 
and the second period to the three milkings after dehorning. 
TABLE Y. 
SUMMAKY. 
--- 
Nine Cows 
Dehorned. 
Six Cows not 
Dehorned. 
316.3 
196.45 
Milk yield first period. 
294.1 
190.35 
22.2 
6.2 
Shrinkage of milk during second penuu. 
7. 
3. 
Per cent, of shrinkage in mint.. 
12.753 
9.68 
Yield of fat in Tbs., first period.... 
12.289 
8.60 
.464 
1.08 
Shrinkage in Ids., tat... • • • • .. 
Per cent, of shrinkage in fat. 
3. 
11. 
Bv comparing the yield ol milk of the cows dehornec 
with that of the cows not dehorned, it will be observed tha 
the former gave 22.2 lbs. less during the three milkings aftei 
being dehorned, the latter losing 6.2 lbs.; the dehorned cow: 
shrinking seven per cent., while the others lost three per cent 
Comparing the total fat products of these two groups o 
cows for the same periods, we find a much greater discrep 
ancy, the dehorned cows showing a shrinkage of only thre 
per cent., while the six cows not dehorned lost eleven pe 
cent. It would appear from these observations that while th 
operation of dehorning may cause a slight, temporary van: 
tion in the flow ol milk and fat content, the normal flow an 
per cent, of fat is quickly recovered, and that cows only sei 
ing the operation and smelling the blood show a greate 
shrinkage in fat than do the ones dehorned. 
BROKEN WIND. 
' By Enos Walter, Student. 
(A paper read before the Chicago Veterinary College Association). 
Inasmuch as you have listened to one essay on this subje. 
this session only certain points in the disease will be discusse 
in this paper. We will begin with a sketch of the pneum 
gastric nerve. . . , : 
The pneumogastric nerve arises by its sensitive roots fro 
