^iS Mr. ClarkV Ob/ervattons on the Genus Oeftrm. 



and thofe who \vi(h to obtain them for cabinets of natural hif- 

 tory, or for examination, will alio find this the mod effectual way. 



We know of no medicine that will detach them from the fto- 

 mach or inteftines, though there are not wanting abundance of 

 infallible noftrums among the very numerous proferTors of this art. 



Another both eafy and effectual mode, at lead for the CE. Equi 9 

 is to deftroy the eggs which are depofited on the hairs of the horfe, 

 and are eafily {cen and removed by a pair of fciffars, or by means 

 of a bruih. and warm water. 



In the fheep it will be much more difficult to prevent or deftroy 

 them by any of thefe means ; particularly if they are feated in the 

 maxillary finufes: in this cafe trepanning wfluld be infufficient, as 

 they would probably be concealed among the convolutions of the 

 turbinated bones. 



Perhaps the removal of the fheep to a diftant pafture, during 

 the months of June and July, while greateft part of the bots are 

 yet on the ground in the chry falls ftate, and not bringing them on 

 the pafture again till the fetting in of the winter, would be the 

 means of deftroy in g them moft effectually ; and if repeated for two 

 or three years fucceflively, when they are particularly troublefomc, 

 the farmers might eventually find their account in it. 



On the other hand, notwithftanding the apparently unnecefTary 

 exiftence and cruel effects of the Oe/lrl, they are probably not alto- 

 gether without an ufe, or were defigned by Providence to add, with- 

 out a recompenfe, to the numerous fufferings of thefe ufeful and 

 laborious creatures. 



A phyfiologica* view of their effects will, perhaps, beft juftify 

 their exiftence, and fave them from fuch an imputation. 



The larvce of the Oeftri, when applied under proper redactions, 

 and to a certain extent, may be of greater utility than from our 



prefent 



