52 ANALVsEs 6r Tikk potato. 



XVIII. GILKEY POTATO. 



MERCER, GHEHANGOEB, MESHOKIfOC, kerchakubck. 



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 centnin. 



Water 24300 



Starch 3999 1333 



Albumen ....... 338 1'12 



Casein 364 1'21 



Dextrine 1'81 060 



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



From this analysis it appears that this variety, when yonitg, 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. 



Proportions of water and ask of young and old potatoes. 

 Young potatoes, 100 grs. g^ve 



Dry 17-55 



Ash 107 



Calculated dry 6 09 



Old set, 100 grs. inside gave 



Dry matter 3-54 



Ash 0-61 



Old set outside, in 100 grs. gave 

 Dry matter --...... 6"72 



Ash ....-.-- I'Qi 



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 water and ash in different parts of the vines. 



I. LeaTcs of one stalk or vine, collected on the 12th of June. 



Per centum. 



Quantity 781-50 grs. 10000 



Dry matter 9310 llSa 



Ash 16-03 2-Ofi 



