ANALYSES OF THE POTATO. 
43 
1. Analysis of the ash of the Merino 'potato in three parts. 
1. Rose end. 
2. Heel end. 
3. Middle. 
Silex 
- 
- 
1*586 
4-019 
1-658 
Coal 
- 
- 
0*180 
0-612 
Carbonate of lime 
« 
0-070 
0*060 
0*984 
Phosphates 
- 
- 
14*533 
20*842 
23*714 
Potash - - • 
- 
- 
50-213 
48-855 
38-708 
Soda 
- 
- 
13*713 
15-066 ' 
18-518 
Sulphuric acid 
- 
- 
8*125 
8*424 
8-471 
Chlorine - 
- 
- 
i • no 
1-242 
0*897 
Insoluble 
- 
- 
3-466 
4*210 
Organic acids - 
- 
- 
6-000 
0-813 
Organic matter 
- 
- 
2*830 
Magnesia 
- 
- 
trace. 
trace. 
trace. 
98*996 
99*933 
99-990 
These analyses, it will be observed, are calculated without carbonic acid. The ash of 
the ends effervesced strongly; the middle, less so : in each instance showing the former 
existence of organic acids, which, by burning, had been converted into carbonate. The 
ash, however, in each instance, was converted in part into a caustic state. The potato, it 
is proper to say, was not peeled ; but the outside was well cleansed from dirt by a brush, 
without abrading the skim 
2. Organic analysis of the Merino potato. 
From the garden of Mr. Walsh, Lansingburgh. 
Middle. 
Starch -------- 13 • 755 
Fibre -------- 6*766 
Albumen - - - - - - - 0*112 
Gluten and fat ----- O’284 
Casein ....... O’605 
Dextrine .------ 0 556 
Sugar and extract ..... 2’773 
MEAN PERCENTAGE OF WATER IN THE TWO ENDS. 
Water ------- 74'3865 
Dry matter ------ 25'6135 
Ash.- 0-7165 
Calculated dry ------ 3’7685 
PROPORTIONS OF THE TWO ENDS. 
Rose end. Heel end. 
Water.81’301 67’472 
Dry matter.18’699 32'528 
Ash - 0-973 0-460 
Ash calculated dry .... 5'401 2’136 S. 
