ICO WALL'S MANUAL 



Animals are composed (like plants) of atmospheric 

 and mineral matter, and everything necessary to 

 build them up, exists in plants. It is one of the 

 offices of the vegetable world, to prepare the grass in 

 the air, and the minerals in the earth, for the use of 

 animal life; and, to effect this, plants put these gases 

 and minerals together in w T heat, corn, oats, barley 

 and, in fact, all the productions of the earth, 



In animals, the compounds containing no nitrogen, 

 comprise the fatty substances, parts of the blood, 

 etc., while the protein compounds, or those which 

 contain nitrogen, form the muscle, blood, a part of the 

 bones, the hair, and other portions of the body, 



Animals contain a larger proportion of mineral 

 matter than plants do. Bones contain a largo 

 quantity of phosphate of lime, and we find other 

 mineral compounds performing important offices in 

 the system. 



In order that animals may be perfectly developed, 

 they must, of course, receive as food, all of the 

 materials required to form their bodies. They 

 cannot live, if fed entirely on one ingredient. Thus, 

 for example, if starch alone be eaten by the animal, 

 he might become fat, but his strength would soon 

 fail, because his food contains nothing to keep up the 

 vigor of the muscles. If, on the contrary, the food of 

 an animal consisted entirely of gluten, he might be 

 very strong from the development of muscle, but 

 would not become fat- 

 Hence, we sec, that in order to keep up the proper 

 proportion of both fat and muscle in our animals, or in 

 ourselves, the food must be such as contains a proper 

 proportion of both classes of vegetable products. 



