ON DISEASES OF ANIMALS. 55 



the fourth to the sixth day of the disease, and they 

 died from the second to the eleventh day after the 

 commencement. The blood of the animal then 

 proved thin ; the intestines inflamed and putrid, the 

 lungs gangrenous, the gall bladder always greatly 

 enlarged, and many worms were found in the liver. 

 The symptoms were generally the same ; and Cam-, 

 per, who strictly watched the appearance, progress, 

 and issue of the malady, pronounced it a contagious 

 putrid fever. Animals once attacked were never lia- 

 ble to its recurrence, or at least very rarely ; hence 

 Camper, from that and other circumstances, conclu- 

 ded that to repress it, four principal objects are to be 

 kept in view. 1. To endeavor to prevent the mala- 

 dy and abate its virulence. 2. To preserve the flu- 

 ids from corruption. 3. To preserve the strength of 

 the animal. 4. To cleanse the intestines immediate- 

 ly on the appearance of the disease. There was no 

 way of guarding against contagion, but by excluding 

 diseased animals, and all substances by which infec-? 

 tion might be communicated. He also conceived 

 that inoculation was the most probable method of 

 averting the malignity of the distemper ; forty-six out 

 of ninety-two infected animals were saved, and of 

 cows that were not very far advanced in gestation, 

 three fourths were saved, lnoculatio n was success- 

 fully practised in Denmark ; in the first three years 

 of the experiment, less than a sixth of the infected 

 animals died. Strong prejudices in England were 

 opposed to it, lest it might introduce the disease 

 where it did not before exist. Camper established 

 several important points ; such as, that the epizooty 



