EFFECT OF CATTLE TICK ON MILK PRODUCTION. 



Table 2. — Temperature records of the experimental cows at various periods and average 



of all readings. 





Degree of tick infestation. 



July 27, 

 p. m. 



Aug. 2, 

 p. m. 



Aug. 6, 

 p. m. 



Aug. 14, 

 p. m. 



Aug. 19, 

 p. m. 



Aug 



.27. 



Sept. 1, 



No. 



A. M. 



P. M. 



p. m. 



1 





102.2 

 102.2 

 103.2 

 102.0 

 103. 2 

 102.8 

 102.6 

 104.4 

 101.1 

 103.2 

 102.8 

 104.0 

 103.6 

 103.6 

 102.8 

 104.0 

 106.8 

 104.0 

 103. 8 



102.2 



102. 8 

 102. 4 

 102.4 

 102.2 

 102.2 

 103. 

 103.2 

 103.0 

 102.8 

 102.4 

 102.2 



103. 

 103.8 

 103. 

 104.0 

 104.6 

 103.0 

 103.4 



101.8 

 101.8 

 103.6 

 103. 

 102.4 

 103.4 

 103. 2 

 102.4 

 102.6 

 101.8 

 101. 8 

 102.4 

 102.0 

 102.4 

 102. 8 

 102.4 

 103.6 

 103.2 

 102.2 



103.2 

 103.6 

 105.0 

 103.8 

 104.8 

 105.9 

 104.4 

 104.7 

 104. 5 

 103.8 

 103.0 

 104.4 

 104.4 

 105. 

 103.8 

 104.4 

 106.8 

 104.2 

 104.2 



101.8 

 101.8 

 102.8 

 101.8 

 102.5 

 103.2 

 102.2 

 103.0 

 102.8 

 103.2 

 102.2 

 103. 4 

 103. 

 103. 8 

 103.6 

 104.0 

 106.2 

 103.6 

 103.6 



101.8 

 101.8 

 102.6 

 101.8 

 101.6 

 102.2 

 101.2 

 101.8 

 101.2 

 101.8 

 101.6 

 102.4 

 102.0 

 102.2 

 103.2 

 102.2 

 104.4 

 102.2 

 102.2 



101.6 



102.3 

 102.2 

 101.6 

 102.2 

 101.2 

 102.2 

 102.6 

 101.6 

 102.4 

 102.8 

 103.2 

 102.2 

 103.0 

 105. 

 103.0 

 102.8 

 102.6 

 102.8 



102.6 



2 



.. do 



104.0 



3 



do 



104.4 



5 

 6 



do 



103.0 



do 



105.4 



do 



105.2 



8 



do 



104.6 



9 



do 



105.0 



10 



do 



103.0 



11 



Light 



103.6 



14 





102.8 



18 

 19 



do 



do 



104.2 

 103.8 



16 





104.8 



17 



do 



104.2 



12 





104.2 



13 



do 



106.2 



15 



do 



105.2 



20 



.do 



103. 8 









Cow 

 No. 



Degree of tick infestation. 



Sept. 2, 

 p. m. 



Sept. 3, 

 p. m. 



Sept. 4, 

 p. m. 



Sept. 5, 

 p. m. 



Oct. 1, 

 p. m. 



Oct. 2, 

 p. m. 



Oct. 3, 

 p. m. 



Aver- 

 age. 



1 



Free 



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 



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 



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 



100.2 

 102.2 

 103.0 

 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 



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 



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 



102. 16 



2 



5 



G 

 7 

 8 

 9 

 10 



do 



do 



do 



do 



do 



do 



do 



...do 



102. 53 



103. 52 

 102. 88 

 103. 25 

 103. 35 

 103. 08 

 103. 52 

 102. 65 



11 



Light 



103. 00 



14 

 18 

 19 

 16 

 17 

 12 

 13 

 15 

 20 



do 



do 



do 



Medium 



do.... 



Heavy 



do 



do 



do 



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 



