302 



ANALYSES OF THE SWEET POTATO. 



2. Analysis of the tubers. 



Silica - 



Earthy phosphates 

 Carbonate of lime - 

 Magnesia 

 Potash - 

 Soda - 

 Sulphuric acid 

 Chlorine 

 Organic matter 

 Carbonic acid 



1-850 



21-100 



0-600 



0-500 



48-365 



5-025 



1-200 



4-090 



2-456 



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 Siveel 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 1-850 



Matter dissolved out of fibre by a weak solution 



of caustic potash 2-100 



Albumen 5-900 - 



Casein 1-050 



A body that resembles balsam ... 0-225 



Water 69-515 



101-835 S. 



1'ROPORTION*. 



Per centum. 



Water 69-515 



Dry matter 30-485 



Ash 1-090 



Ash calculated on the dry matter ... 3 -247 S. 



