OF THE POTATOE. 429 
There is a deficiency in this analysis of more 
than 4.0 per cent. 
Boussingault obtained in 100 parts, dry mate- 
rial, 24.1, water, 75.9. 
The quantity of starch and gluten per acre is 
stated by Mr. Karkeek to be, in 123 tons or 
26,880 Ibs. 
Gluten, ’ Starch, Gum, } 
Albumen, &c.  500lbs. Sugar & Fat pee. Water 20,250 
or, 2.2 per cent. 12% 
A deficiency also occurs here of 2700 Ibs., or 
nearly 10 per cent. of which no account is given. 
Dr. Kane, in a Table collected from the best 
authorities, gives the quantity of actual nutritious 
material usually derived from a statute acre of 
ground as 9 tons, or 20,160 lbs., producing 
Starch and Sugar Gluten Oil Total. 
3427 lbs. 604 45 4076 
or, 17.0 per cent. 3.0 0.2 water 79.8 
If the mean of the analysis of Payen be taken, 
the produce per acre will be rather more than 
103 tons, or 23,946 lbs., consisting of 
3L 
