52 ANALYSES OK THE POTATO. 



XVIII. GILKEY POTATO. 



MERCER, CHENANGOES, MESHONNOC, NERCHANKECK. 



The young tuber, obtained in the Albany market the 7th or 8th of June. They were 

 only about half grown, or considerably less than when in market in their season. 



Organic analysis of 300 grs. 



Per centum. 



Water 243-00 



Starch 39-99 13-33 



Albumen 3-38 1 - 12 



Casein 364 1-21 



Dextrine 1-81 0-60 



Fibre, oil, sugar and gluten ... 11-85 3*95 S. 



From this analysis it appears that this variety, when young, is as rich in nutritive matter 

 as when mature. 



The fibre gave ash 1*8143, or 0-6037 per centum; and consists -of sulphate of lime, 

 magnesia, and but a small proportion of phosphate of lime and magnesia. 



Pro-portions of water and ash of young and old -potatoes. 

 Young potatoes, 100 grs. gave 



Dry 17-55 



Ash 107 



Calculated dry 6-09 



Old set, 100 grs. inside gave 



Dry matter 3-54 



Ash 0-51 



Old set outside, in 100 grs. gave 



Dry matter 5 '72 



Ash 1-64 



It will be observed, that in the old set, the inside is mostly water ; that the water in fact 

 increases, while the inorganic matter diminishes, and it probably goes into the young set 

 in the condition of nutriment. 



Proportion of ivater and ash in different parts of the vines. 



1. Leaves of one stalk or vine, collected on the 12th of June. 



Per centum. 



Quantity 781-50 grs. 100-00 



Dry matter 93-10 11-88 



Ash 1603 2-05 



