212 



AGRICULTURAL TEXT-BOOK. 



464. Proximate analysis of the Potato: 



MICHAELIS. 



JOHXSTOX. 



Red Potato. 



Natural state. Dry. 



According to Illisch, what was formerly believed to be citric acid is 

 phosphoric, muriatic, and malic acids. 



465. Inorganic analysis of the Potato. (Boussingault; 

 Fromberg; and Daubeny.) 



466. According to Boussingault and Liebig, the nutritive 

 ] &amp;gt;ower of the potato is very low. &quot;A horse may be kept alive&quot; 

 says the latter &quot;by feeding it with potatoes, but life thus sup 

 ported is gradual starvation ; the animal increases neither in size 

 or strength, and sinks under every exertion.&quot; The true value 

 of this tuber, as food, is evidently to supply carbon, in the shape 



