other germs of disease, the indigested portion will 

 pass out as feces. The pig should be fed as much 

 during the fattening period as it can digest and 

 nothing more. This can be easily ascertained by 

 examining the feces. The kidneys secrete the 

 urine and other effete material, the result of the 

 disintegration of the nitrogenous substances in 

 the body; they require to be in a healthy, active 

 state to perform this function, or blood poisoning 

 is the result; if not blood poisoning, sufficient dis- 

 turbance is caused to leave the animal liable to 

 disease. The heart should be strong and vigorous 

 in order to be able to propel the blood to all the 

 tissues of the body to nourish them. The lungs 

 should be strong, with large capacity to draw in 

 oxygen and give off carbonic dioxide and other ef- 

 fete materials, in this way keeping the blood pure. 

 The nerves which govern all parts of the body 

 should be strong and active. This is largely ac- 

 complished by the kind of food we feed the animal. 

 What is the animal body composed of? The 

 chemical constituents of the animal body may be 

 thus classified: First, albuminous substances, 

 characterized by the presence of nitrogen, carbon, 

 hydrogen and oxygen. Second, carbo-hydrates 

 and hydro-carbons, characterized by the absence 

 of nitrogen and the presence of carbon, hydrogen 

 and oxygen. Third, salts and water. In order to 

 keep all the tissues of the body in healthy action 

 and vigor, it is necessary to see that the animal 

 gets a food which contains all these elements or 

 to give a mixed diet which will combine to furnish 



