ON RESPIRATION. 129 



Its escape backwards whenever the animal 

 coughs. This circumstance probably gave 

 birth to the ridiculous custom of making an arti- 

 ficial and supplementary anus^ with a view of 

 facilitating the egress of the wind, which was 

 erroneously supposed to be the cause of the dis- 

 ease. Broken-winded horses are commonly 

 much better at grass than in the stable. This 

 arises from their being surrounded with a more 

 salubrious atmosphere, and from the green food 

 being more easy of digestion than hay and corn. 

 On this account carrots are given to horses of 

 this description with advantage. 



Some horses acquire a habit of biting their 

 manger, accompanied with a convulsive mo- 

 tion of the windpipe ; in the language of the 

 stable, they are distinguished by the name of 

 Crib-biters. 



During this action, it is supposed that 



they suck air into the stomach; but several 



K reasons 



