438 EEPORT OF THE BUEEATT OF AtflMAL INDtJSTEY. 



variety of circumstances, but all died with the same symptoms, and 

 in cases that were observed showed characteristic lesions of the dis- 

 ease. 



Of these animals those belonging to Long & Boston were the first 

 exposed to the disease. As narrated above, they were not only past- 

 ured along the road on the same afternoon that the herd had been 

 driven to Unionville, but had probably mixed with the herd for some 

 distance. About this latter point there seems to be a difference of 

 opinion. The two cattle were known as the "bell team," and past- 

 ured on the commons. They were first exposed on the llth of August. 

 They may have pastured along the road after that date. They also 

 may have had communication with Samuel Kiefer's cattle on an ad- 

 joining farm. Each was noticed to be sick about two days before 

 death, and on opening the bladders they were found to be filled with 

 red fluid. Such symptoms as could be obtained corresponded with 

 those passed through by other animals stricken with the disease. 

 The first one died on the 25th and the second on the 26th of August. 

 From the first opportunity of exposure until death but fourteen days 

 had elapsed. The animals in each case showed their illness on the 

 day before death, and therefore the incubative stage could have been 

 but twelve days at the outside for the first, and thirteen for the sec- 

 ond. The first stage of infection lasted in either case but a few hours. 

 These were the first native cows exposed. 



The next native cows exposed belonged to Mr. George Norris and 

 were pastured in an adjoining pasture. A few feet of a brook that 

 ran through the pasture confining the natives were included in their 

 pasture. They were first exposed on the llth of August, when the 

 infected herd was admitted. The first sickened on the 22d and died 

 on the 23d; the second died on the 29th, being ill but two days; the 

 third died on the 4th of September, having been ill but one day, and 

 the fourth on the llth. Two others are said to have died, but of 

 these I could get no positive data. Each having died at such regular 

 intervals caused Mr. Norris to think that they had been catching the 

 disease from each other. * The first could not have had a longer incu- 

 bative stage than from the llth to the 23d of August, or eleven days, f 

 The second may have had an incubative stage of nineteen days, the 

 third twenty-four days, and the fourth thirty -one days. The incuba- 

 tive stage of these latter animals will rest more in doubt, for they 

 inay not have contracted the disease as early as the first. The stage 

 of fever in each case was about two days. Thuse animals, as de- 

 scribed in the historical evidence, died of Southern cattle fever. The 

 post-mortem examination of the third that died fully confirmed the 

 diagnosis. 



Mr. William Baker drove home on August 13 an infected heifer 

 and a native cow bought in the village. The cow fell off in milk 

 after arriving, but regained it subsequently. She died on the 22d of 

 August, six days before the heifer. Further than external symp- 

 toms there was little to be relied upon. It was said that they acted 

 alike, and that the cow had a large gall-bladder. The date of incu- 

 bation in this case, if the cow died of the disease, was but nine day^s 

 at the outside. If we allow two days as the stage of fever then it 



* The following data are vitiated by the presence of the 26 head bought in Chi- 

 cago and placed in the meadows June 26. See history at end of article. 



fin truth, this period was nearer ten full days than eleven, for the animals did 

 not arrive until the evening of the llth, and the 22d and 23d should be called days 

 of the stage of fever. 



