now rm; animal mves 239 



reJ blood globiih's, while th« dark roil huo is oftustd by (he 

 comparative absoiu'e of oxygi-n. The li<iuitl ilements of the 

 blood (serum) can absorb and convey but little oxyjjcn. lu 

 order to have free and healthy breathinp, therefore, the blood 

 inu8t contain abundance of red globules, and these must be 

 well developed, containing n large amount of the red coloring 

 matter. Ill health, luck of sunshine, and varipu:^ diseases, 

 which cause diminution of the red gloljules or of their coloring 

 mutter, interfere with respiration and consequently with the 

 healthy nutrition and function of the tissurs of the animal. 



4Jtj<j. I'ei-sons who desire a detailed account of the physiology 

 of domestic animals, may consult F. Smith's "Mantial of Veteri- 

 nary Physiolosrv." Advice as to the treatment of animals is 

 w-ontuined in Law s " Farmer's Veterinary Adviser." 



