APPENDIX. 
RECORDS OF THE EXPERIMENTAL COWS. 
The following tables show the records of the experimental cows for 
the whole test by 10-day periods. Table I gives the results by groups, 
and Table II the individual records of each of the cows. Originally 
there were 20 cows in the experiment, 10 in each group, but, as before 
stated, an injury to one of the tick-free cows necessitated her removal 
from the test. Therefore, in Table I the tick-free group consists of 
9 cows, and in Table II no data are given for cow 4, the cow in 
question. 
Table I. — Group records of experimental cows by 10-day periods. 
TICK-FREE COWS. 
Amount of 
Amount of 
Milk production. 
feed con- 
suraed 
per cow. 
Ten-day 
Milk production. 
feed con- 
su med 
per cow. 
Ten-day 
+3 
+j 
«-, 
+j 
-u 
<« 
period 
o 
period 
N 
M , 
o 
ended— 
o 
13 
• 
ended— 
o 
fl 
08 -j 
&£ 
!** 
Sa 
03 ^ 
&£ 
So 
'3 
IS 
> 
©^2 
go 
P 
o 
oS 
'3 
> 
|o 
3x 
ga 
ft 
>> 
o 
>> 
c3 
3 
2 
< 
< 
Pn 
pq 
W 
O 
< 
< 
ph 
pq 
w 
o 
1913. 
Lbs. 
Lbs. 
P.ct. 
Lbs. 
Lbs. 
Lbs. 
1913. 
Lbs. 
Lbs. 
P.ct. 
Lbs. 
Lbs. 
TM. 
May 30 
176.2 
6.58 
3.73 
719.2 
168.9 
48.8 
Aug. 28 
125.5 
5.37 
4.28 
727. 6 
185.3 
45.6 
June 9 
157. 3 
5.87 
3.73 
724.4 
173.9 
44.0 
Sept. 7 
120.6 
5.00 
4.13 
738.9 
179.4 
45.6 
June 19 
154. 4 
5.62 
3.64 
723.4 
172.7 
46.7 
Sept. 17 
122.9 
5.24 
4.26 
748.6 
172.7 
44.5 
June 29 
155.2 
5.84 
3.76 
694.7 
172.3 
45.6 
Sept. 27 
104.2 
4.64 
4.45 
756.8 
169.9 
44.5 
July 9 
164.0 
6.04 
3.69 
703.1 
189.2 
45.6 
Oct. 17 
92.1 
4.42 
4.79 
763.4 
170.8 
44.5 
July 19 
161.7 
5.96 
3.69 
703.1 
190.3 
45.6 
July 29 
150.3 
5.98 
3.97 
706.9 
196.1 
45.6 
Total per 
Aug. 8 
122.3 
4.56 
3.72 
789.3 
182.1 
45.6 
cow 
1,932.4 
76.30 
2,500.4 
637.8 
Aug. 18...... 
125.7 
5.18 
4.12 
718.0 
176.8 
45.6 
TICK-INFESTED COWS. 
May 30. 
June 9.. 
June 19. 
June 29. 
July 9.. 
July 19. 
July 29. 
Aug. 8. . 
Aug. 18. 
JS 
177.9 
6.38 
3.58 
707.2 
163. 9 
47.7 
171.6 
5.85 
3.41 
712.8 
169.7 
44.3 
168.7 
5.93 
3. 51 
726.7 
174.8 
50.1 
161.1 
5.61 
3.48 
691.6 
174.2 
47.0 
165.9 
5.86 
3.54 
705.6 
193.8 
47.0 
158.1 
5.55 
3.51 
702.7 
191.1 
47.0 
143.6 
5.12 
3. 56 
706.1 
190.5 
47.7 
107.6 
3.73 
3.46 
782.3 
176.7 
47.0 
110. 5 
4.20 
3.80 
728.0 
180.7 
47.0 
Aug. 28. 
Sept. 7.. 
Sept. 17. 
Sept. 27. 
Oct. 7... 
Total per 
cow. . .. 
104.5 
97.8 
72.5 
60.6 
1,783.3 66.00 
4.15 
3.65 
3.68 
3.43 
2. S6 
3.87 
3.73 
4.23 
4.72 
4.71 
715.6 
707.7 
717.0 
721.2 
732.9 
1M 
170.6 
159. 3 
161.6 
145. 4 
2, 436. ! 
47.0 
47.0 
45.0 
49.5 
44.6 
fr57.9 
