[ 3$* ] 



it, as thereby the different mufcles of the body are 

 exercifed, and various poftures ufed, which contri- 

 bute to ftrengthen the body more generally, and 

 alfo relieve the mind by a diverfity of attentions. 



A farther advantage attending the nature of la- 

 bour in husbandry is, that it is performed in the 

 open air, which in general muft be pure and whol- 

 fome, as being free from fmoke and other vapours 

 arifing from inflamed bodies, and alfo from putrid 

 exhalations both of the animal and vegetable kind, 

 which are well known to taint the air in large ci- 

 ties, and in manufactories of every kind, where 

 great numbers of people are afTembled in a fmall 

 compafs. 



The furface or ftaple of the foil, which is the fub- 

 ject of thefe operations, does not give out any noxi- 

 ous odours, like many of the mineral or metalline 

 fubftances employed in feveral manufactories, but 

 is at lead perfectly innocent, and has even been 

 thought to produce effluvia rather favourable than 

 injurious to health. The number of vegetables, 

 likewife, with which perf6ns concerned in fuch em- 

 ployments are generally furrounded, contribute to 

 render the air which is refpired pure and falubrious, 

 by abforbing the putrid and phlogiftic fubftances 

 that float m the atmofphere. 



The 



