112 VETERINARY 



When these worms are only in small numbers 

 in a horse, they do very little harm to the animal ;■ 

 but there are seasons in which they increase to such 

 vast numbers, that they become a very fatal ma- 

 lady. In some years, when horses have died 

 of a sort of epidemical disease, after they have 

 been opened, prodigious quantities of these worms 

 have been found living in their stomachs, each 

 having formed a sort of cell in its membranes, and 

 all being lodged there, as close together as the 

 seeds in a pomegranate. Nor need we wonder 

 how such immense numbers should be found in 

 one horse, since one female is able to deposit se- 

 veral hundreds. 



When these worms are fallen from the intestines, 

 they crawl about till they find some place of safety, 

 where they make a shell of their skin, and undergo 

 all their changes ; whence they finally come out 

 in the form of their parent fly. 



From what has been said, it may be suspected,* 

 that all horses which have been at grafs during 

 the summer and autumn, have received a quantity 

 of these worms into their intestines ; and that it 

 becomes evidently necefsary that a course of 

 physic should be adopted, on their being removed 

 into a stable. For the destruction and removal of 



