54 Woj^ms, 



He goes on to remaTk> that the common Aloetic Purgatives do ro^ 

 destroy them, because if they did, we should frequently see them ia 

 the Foeces^ as well as the Round- Worm and Needle- Worm. He 



further informs us^ that he has found the Bots vigoroudy alive, cm 



-I 



dissection of a Horse which died of a Locked Jaw^ after liaving- - 

 taken in the course of aweek, a quantity of solid Opium^ that was 

 equal to five pints and an half of Liquid Laudanum. Tobacco too. 

 he says, has been g'iven in much larger: quantities, and has^ been 

 much longer conlSnued^ in the same complaint, without destroying" 

 the Bots. Nor is there any thing in these facts, which ought in the 

 smallest degree to surprise us, when we recollect that Goats will eat 

 with impunity, such substances as will prove deleterious poisons to 

 other classes of animals. I recollect many yeai's ago an instance of" 

 a small Pig, which, having made its way into the Elaboratory of a 

 Chymist in London, drank up several pints of Goulard's Extract of 

 Lead, and was not in the smallest degree disordered by it. The 

 Philosopher will always recollect, that differeilt systems, are governed , 

 by difi'erent law^s, and we know but little of the conditions, on which 

 life and health are supported, in the inferior classes of Reptiles and^j 

 Insects, If, however, notwithstanding the reasons I have advanced,.^ 

 I have failed to convince my readers of the harmlessness of Bots to 

 Horses, then may Mr. Clarke's suggestions respecting the best me- 

 thods of lessening their numbers, be considered as highly valuable. 



He advises that all Horses which have been at grass the preceding 

 summer, should be examined for the Bots, from the latter end of 

 May to the middle of July, which is the period, when, having ob- 

 tained their full growth, they are making their way from the stomach^ 

 and intestines, in order to pass into their next stage of existence ; 



