EXERCISE. 251 



of both time and paper, we neceflarily return 

 to the gradations of exercife beft adapted to 

 the different degrees of horfes, according to 

 their various ftates of condition. Many cal- 

 culations have been made upon the poffible 

 labour and continued exertions of this fpecies, 

 and we are by no means ignorant of their 

 great and almoft incredible execution, when 

 brought (for the decilion of betts) into trials 

 of feyerity upon the turf or road^ both ioi 

 fpeed and duration. 



The diflindion to be made in the prefent 

 inftance, is only the line between what is tp 

 be confidered as vjork, and what as the falu- 

 tary intervention of exercife ; opinions (fo 

 near as fpeculative attention can form a de^^ 

 gree of coniiftency) admit, that horfes of 

 moderate qualifications and moderately fup- 

 ported, will conftantly travel, or journey in 

 their accuftomed employment, from fixteen 

 to twenty miles every day, through the year, 

 without the leaft inconvenience or bodily de- 

 bilitation, m.ore than what naturally arifes 

 from the increafing age of the fubjedt. This, 

 however, being fixed as a kind of conditional 



ilandard 



