302 
ANALYSES OF THE SWEET POTATO. 
2. Analysis of the tubers. 
Silica ------- - 1*850 
Earthy phosphates ----- 21'100 
Carbonate of lime.0‘600 
Magnesia ------- O’500 
Potash. 48*365 
Soda. 5-025 
Sulphuric acid ------ 1*200 
Chlorine ------- 4*090 
Organic matter ------ 2*456 
Carbonic acid.15*725 
98*911 
It will be seen, by comparing the amount of potash in the Sweet potato with that in the 
common potato, that a very close resemblance exists between them in the amount of 
potash. There is also the same close resemblance in the percentage of the ash ; but it is 
proper to remark that the percentage of ash may be rather low, on account of its easy 
fusibility and its liability to causticity. 
3. Proximate organic analysis of the Sioeet potato. 
Starch ------- - 19*955 
Sugar and extractive matter, mostly sugar - 5*800 
Dextrine ------- 0*750 
Fibre after boiling in a weak solution of caustic 
potash - - - - 
Matter dissolved out of fibre by 
of caustic potash 
Albumen - 
Casein - 
A body that resembles balsam 
Water - 
1*850 
weak solution 
2*100 
5*900 
1*050 
0*225 
69*515 
101*835 S. 
PROPORTIONS. 
Water - 
Dry matter - 
Ash. 
Ash calculated on the dry matter 
Per centum. 
69*515 
30*485 
1*090 
3*247 S 
