Animal Diseases. 265 



During the first few days the temperature was irregular, and then 

 took a normal course, but thereafter the following temperatures were 

 recorded : — 



loth day 1046 



nth „ io6'6 



i2th „ io6"6 



13th „ 107-0 



14th „ 107-4 



15th „ 107-4 



i6th „ 105-4 



17th „ 96-8 Death. 



In this case the post-mortem examination showed very well- 

 marked symptoms of Heart-water. 



These experiments therefore showed : — 



1. In a most definite fashion, that cattle from sweet veld areas 

 are more or less susceptible to Horse-sickness. 



2. That the disease so produced was indistinguishable from 

 that which had occurred spontaneously in our camp. 



Still, however, I was unable to identify the disease, although I 

 learned that it was well known to the Kafirs under the name of 

 Imapunga. 



Shortly after this a number of deaths were occurring among 

 young calves on the farm of Mr. Hyde, and Mr. Robertson and I, 

 who proceeded there, obtained a post-mortem examination which 

 enabled us to determine that it was the same disease which we had 

 already seen in our camp. 



During the past two years a very large mortality has occurred, 

 among calves, from this disease, but it is to be remarked that the 

 old animals are either insusceptible or well protected, since very few 

 of the old animals which have been accustomed to the veld die of it. 



In the case of animals, however, which are brought from sweet 

 veld areas, it is the rule rather than the exception for them all to die. 



I have had to import a considerable number of calves from other 

 areas for use in the Institute, and among these a fairly heavy mortality 

 has occurred from this cause. 



During the war a large number of fine trek oxen were sent to 

 Grahamtown by the Military Authorities, and to the best of my 

 knowledge almost all of these coming from De Aar, Naauwpoort, and 

 Cradock died. The following will show the results in two lots coming, 

 respectively, from Naauwpoort and Cradock : — 



I. Oxen from Naauwpoort (16) which arrived at Grahamstown 

 on the 23rd August, 1901 : — 



I died on September 25th. 



I died on September 27th. 



I died on October 3rd. 



I died on October 8th. 



I died on November 15th. 



I died on November 24th 



