EFFECT OF CATTLE TICK ON MILK PRODUCTION. 
he experimental 
of all readings. 
Table 2.— Temperature records of the experimental cows at various periods and average 
of all i 
Cow 
No. 
Decree of lick infestation. 
Free. . . 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
Light.. 
do.. 
....do.. 
....do.. 
.Medium 
....do.. 
Heavy . 
....do.. 
....do.. 
....do.. 
Aug. 27. 
July 27, 
A.ug.2, 
A.ug.6, 
Aug. 14, 
Aug. 19, 
p. m. 
]). m. 
p. in. 
p. m. 
p. m. 
A. M. 
P. M. 
102.2 
102.2 
101.8 
103. 2 
101.8 
101.8 
101.6 
102.2 
102.8 
101.8 
103.6 
101.8 
L01.8 
102. 3 
108. 2 
102. 1 
103.6 
105.6 
102.8 
102. 6 
102. 2 
102.0 
102. -1 
103. 
103.8 
101.8 
101.8 
101.6 
103. 2 
102.2 
102.4 
104.8 
102. 5 
101.6 
102.2 
102. S 
102.2 
103.4 
105. 9 
103. 2 
102.2 
101.2 
102.6 
103. 
103. 2 
104.4 
102.2 
101.2 
102.2 
10). 1 
103. 2 
102.4 
104.7 
103. 
101.8 
102.6 
101. 1 
103.0 
102.6 
104. 5 
102. 8 
101.2 
101.6 
103. 2 
102.8 
101.8 
103.8 
103.2 
101.8 
102. 4 
102. 8 
102.4 
101. 8 
103. 
102.2 
101.6 
102.8 
101.0 
102.2 
102.4 
104.4 
103. 4 
102.4 
103. 2 
103. G 
103. 
102.0 
104.4 
103.0 
102.0 
102.2 
103. 
103.8 
102.4 
105.0 
103. 8 
102.2 
103.0 
102.8 
103. 
102.8 
103.8 
103. 6 
103. 2 
105. 
101.0 
104.0 
102.4 
104.4 
104.0 
102.2 
103. 
106.8 
104.6 
103.6 
106.8 
106.2 
104. 4 
102.8 
104. 
103.0 
103. 2 
104.2 
103. 6 
102. 2 
102.6 
103. 8 
103.4 
102.2 
104.2 
103.6 
102.2 
102.8 
Sept. 1, 
p. m. 
102. 6 
101.0 
104.4 
103.0 
105. 4 
105. 2 
104.6 
105. 
103.0 
103.6 
102.8 
104.2 
103. 8 
104. 8 
104.2 
104.2 
106. 2 
105. 2 
103.8 
Cow- 
No. 
Degree of tick infestation. 
Sept. 2, 
p. m. 
Free.... 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
....do.. 
Light.. 
....do.. 
....do.. 
....do.. 
Med ium 
....do.. 
Heavy . 
....do.. 
....do.. 
....do.. 
102.4 
103.5 
104.2 
103. 
104.6 
104.8 
103.6 
104.6 
103.4 
103. 6 
102.2 
102.8 
105.4 
105.2 
104.2 
104.2 
106.0 
104.2 
103.8 
Sept. 3, 
p. m. 
102.0 
103.4 
105. 2 
103. 8 
104.5 
105. 8 
102.8 
104.2 
102.6 
103.8 
102. 4 
102. 8 
104.4 
104.6 
104.6 
104.0 
105.8 
104.5 
104.2 
Sept. 4, 
p. m. 
Sept. 5, 
p. m. 
102.2 
102.0 
104.2 
102.6 
103.6 
103. 2 
103. 4 
101.8 
102.6 
104.0 
102.8 
104.2 
104.6 
105.6 
104.6 
104.0 
104.0 
104.4 
104.2 
101.8 
100.6 
101.0 
102.4 
101.0 
101.4 
101.0 
102.2 
102.0 
102.2 
102.2 
102.2 
102. 6 
102.8 
102.8 
102.6 
103.4 
102.8 
103.2 
Oct. 1, 
p. m. 
100.2 
102.2 
103. 
104.0 
103. 2 
102.6 
104.4 
103.2 
103. 2 
103.2 
102.2 
103.8 
104.4 
104.8 
104.6 
104.4 
105.0 
106.2 
105.4 
Oct. 2, 
p. m. 
104.2 
103.2 
104.8 
104.0 
104.2 
103. 
104.0 
105. 2 
103.6 
103. 4 
102.2 
103. 2 
104.0 
103. 8 
103.8 
104.2 
105.2 
105.8 
104.4 
Oct. 3, 
p. m. 
102.4 
102.8 
103.6 
104.0 
103.4 
103. 4 
103.6 
104.6 
102.6 
102.2 
102.2 
103.4 
102.7 
103. 6 
103.2 
102.4 
103.6 
105.2 
103.2 
Aver- 
age. 
102. 16 
102. 53 
103. 52 
102.88 
103. 25 
103. 35 
103. 08 
103.52 
102. 65 
103.00 
102. 37 
103.24 
103. 47 
103. 93 
103. 74 
103. 60 
104. 96 
104. 07 
103. 65 
Blood taken from cows 12 and 13 and observed to run from the 
tick wounds of cows 15, 17, and 20 in particular was abnormal in 
being too thin. The red blood clots formed but a small part of the 
mass. All these animals, also cow 16, were noticed to be visibly 
distressed as to feelings and respiration on various occasions. Cow 
15 alone showed a slight pendulous swelling under the lower jaw. 
Cows 11, 14, 18, and 19 were infested with but few large ticks and not 
many visible small ones. Neither were they apparently ill at any 
time. To what quality these cattle owed their immunity from ticks 
is not known. They looked more like Jersey cattle than the other 
ones infested. In color cow 14 was lemon fawn and cow 19 was 
light fawn, and the latter's coat was very short and thin. Cow 15, 
the cow that became most heavily infested, was a large red brindle 
cow that resembled the Shorthorn or beef type. (Fig. 1.) This 
