TBE IMPROVED ART OF FARRIERY. 555 



Corrosive sublimate has been also administered from 

 fourteen grains to three drachms and a half. From 

 this last quantity inflammation arose in the stomach, 

 and coagulable lymph was thrown out. 



Calomel purges and irritates the superior part of the 

 pharjmx and the mouth, but do not seem to effect the 

 salivary glands. There is, however, considerable dan- 

 ger in using it in large quantities. 



Opium may be given in very large doses. Four 

 ounces have been administered at a time. 



Tobacco in every form has been employed, even an 

 infusion of three pounds has been introduced into the 

 stomach without effect. 



Vitriolated zinc acts as a tonic when used in mo- 

 derate quanties : the dose may gradually be increased 

 to half an ounce. 



The lacteals take up a fluid, called chyle, and con- 

 vey it through the lympatic glands, where it seems to 

 undergo some change, into the thoracic duct ; from 

 thence they proceed in the horse to the left jugular 

 vein, but in the human to the left subslavian. This 

 process renews the blood after its various losses. It 

 has been doubted whether the absorbents take up the 

 chyle by capillary attraction, or by some voluntary 

 action of their own. 



Having gone thus far into the animal economy of 

 the stomach of the horse it will not be irrelevant to 

 offer a few remarks on the general system and conse- 

 quences of administering medicines in disease. That 

 this is often done unnecessarily, and, of course, mis- 

 chievously, has been very ably shown by Mr. Clark 

 of Edinburgh. 



" If," saye he, "a man or horse be in a state of 

 health , what more is required, or how can they be 

 rendered better ? Health is the more proper state of 



