38 ANALYSES OF THE POTATO. 



2. Analysis of the phosphates. 

 Phosphates ....-- 38 '500 



Phosphate of peroxide of iron . . • - 7 "900 



Lime 2933 



Magnesia ....... 0"035 



Silicic acid trace. 



Phosphoric acid 27 '6 12 



For an analysis of the soil upon which this potato grew, see Vol. I, p. 342. 



3. Organic analysis of the Mercer potato. 

 Size the same as that from which the ash was obtained. 



PHOPORTIONS. 



Water of the ends 79-509 



Dry matter in the ends 20-492 



Ash of the ends 0-679 



Ash calculated dry 3-746 



AMALTSn. 



Balf from which albumen Half rrom which albamen 

 was teparated. waa not Mparated. 



Starch 9-710 9710 



Fibre 6779 5-779 



Gluten 0-205 0205 



Fatty matter 0084 0084 



Albumen 0-249 0249 



Casein 0-506 0-468 



Dextrine 0721 1265 



Sugar and extract 3-931 2-638 



21-185 20-398 



It is found that the amount of water, ash, etc. difl'er in the ends of the potato. The 

 following results exhibit this fact : 



1. Saed or roae end. 3. Heel end. 



Per cent of water 83-839 75- 177 



Dry matter 16 161 24823 



Ash 0-725 0-431 



Ash calculated dry 5 197 2-296 S. 



These two results with the ends may be compared with the mean, or both ends used 

 together. It becomes necessary, from these differences in the composition of the ends, to 

 examine them separately when lime will permit. The result is interesting, and agree.s 

 with other facts in the same class. 



