Infections of the Ovum, Embryo and Fetus 503 



(3) Thirty-nine heifers in first pregnancy were alleged to have been 



chased by a dog. Some months later eleven of them aborted. 

 McFadyean testified that the abortions were not due to con- 

 tag-ion. 



(4) These experiments were carried out under the auspices of Sir 



Stewart Stockman with material furnished by the Board of 

 Agriculture and Fisheries. 



(5) The nine cows were all recent purchases. Five came from a 



herd where abortion had raged the previous year and were 

 all pregnant when bought. Two had aborted the previous year, 

 two were sterile or had aborted unseen, and one had calved. 

 After inoculation all aborted. The history of the other four 

 was unknown. Three were pregnant when purchased, the 

 fourth was bred after buying. All nine were recent arrivals 

 on the experimental premises, which increased the tendency 

 to abort. 



(6) The heavy percentage of abortions in inoculated cows is caused 



by the high rate of the five cows of Moore, only one of which 

 was known to have calved the previous year. 



(7) The 100 per cent, of abortions in controls is admittedly of no 



moment, but, since the one heifer is the only control of which 

 I can find record, the figures are technically correct. 



(8) The Thurebylille herd consisted of about 130 milk cows and 



about 30 heifers, and the data extend from 1885 to 1896, in- 

 clusive, or a period of twelve years. 



(9) The data given here are for uninoculated cows and heifers kept 



as controls in vaccination against abortion, as shown in 

 Table IV, page 353, Report Tenth International Veterinary 

 Congress. 



(10) Owing to errors in diagnosis. Bland unintentionally inoculated 



five pregnant cows and nine pregnant heifers with living 

 bacilli. (Herd A, two cows, four heifers; Herd M, one cow; 

 Herd Q, one cow; Herd R, one cow; Herd B2, five heifers. 

 Total, fourteen.) 



(11) The two cows which aborted following inoculation had also 



aborted in the pregnancy before inoculation. See also (5). 



(12) Bland, on page 9 of his first report in his experiments to con- 



trol abortion by vaccinating the non-pregnant animal, kept 

 as "cointrols" 296 non-pregnant cows and heifers, thirteen of 

 which were not known to have conceived. Bland's percentage 

 of abortion (18.2) is based upon 296 animals, while the per- 

 centage here given (19.1) is based upon 296 — 13, 283 animals. 



(13) Second report, page 15. 



(14) In the Bland reports the number of animals of prior year is 



not given and total under experiment is used, with percent- 

 ages for prior years. 



