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In June numbers of cattle and horfes are 

 turned loofe upon them ; by which as much 

 is loft as by fheep. The horfes get full of bots, 

 or the fmall needle worms, or, in dry fummers, 

 of fand. A horfe of mine, which had run upon 

 the common in fummer, died, and I was defi- 

 rous of knowing what occafioned his death. — 

 On opening him, upwards of a peck of fand 

 was found in his great ftomach or bag. In 

 mild winters, horfes which have run the fum- 

 mer in the fens do bed there in winter s for, as 

 all horfes feeding on low grounds get the bots 

 or grubs, which are natives of fuch grounds ; 

 fo, while the horfes continue there eating green 

 food, the bots and worms do him little m'ifchief, 

 as they will prefer that kind of nutriment to 

 what they might get by preying upon the ani- 

 mal. But when the horfe quits grafs, and is 

 taken to dry meat, the bots and worms begin 

 to devour his vifcera. They gnaw his intef- 

 tines, they confume the chyle, and prevent the 

 proper fupply to the blood, which afTumes much 

 the fame appearance as the blood of rotten 

 fheep. His head begins to fwellj and fo do 



his 



