QUALITY OF BARLEY GROWN AFTER ROOTS. — 295 
— 

The starch determinations were made as follows: A 
quantity of grain was ground and weighed, then boiled up 
with water for half an hour; after cooling, to c.c. of freshly pre- 
pared malt extract was added to hydrolise the starch, and the 
mixture was allowed to stand in a warm place for twelve hours 
and filtered; the hydrolysis of the starch was then completed 
by boiling the solution with hydrochloric acid and the dextrose 
determined by Fehling’s solution, a correction being made by 
a blank experiment for the malt extract added. For the 
determination of the “crude fibre,’ 2 per cent. solutions of 
sulphuric acid and alkali were employed. The bushel weights 
and other physical factors were determined by Professor J. 
Percival ; the chemical analyses were made by Mr. F. T. 
Holbrook, of the Wye college. 
In the above tables samples 1 to 5, 6 to 10, and 11 to 15 
are from similarly manured plots in three different places ; 16 
and 17, 18 and 19, 20 and 21 are from larger fields, one half 
of which was manured experimentally. 
The dressings used were as follows :— 
Mark A (Numbers 1, 6, 11, 16, 18, 20), unmanured. 
pb ( a5 2, 7, 12, 17), 3 cwt. per acre superphosphate. 
ee en ( » 3, 8, 13), 3 cwt. superphosphate, 1 cwt. sulphate of potash. 
le OME ie 4, 9, 14), 3 cwt. superphosphate, 3 cwt. salt. 
Peels, (( me 5, 10, 15, 19, 21), 5 cwt. superphosphate. 
Of course comparisons can only be instituted between the 
barleys coming from the same field—ze., between the 
members of the series 1 to 5, or the series 6 to 10, or between 
16 and 17, or 20 and 21; but by looking at the figures in this 
way the effect of the manures may be traced. 
Taking the mean values ot samples 1 to 21 we obtain the 
following average composition for barley grown after roots in 
1899 in Kent :— 

Moisture - - - = - - - - - 16°23 per cent. 
Fat - - : - - - ee TO5 a 
Proteids (arouniicns Compounds) - - - Sy OS Ac 
Starch - - - - - 57°9 a 
Pentosans and other Carbohydrates by difference - $87 Ar 
Crude Fibre - - - a 4vt ae 
Ash - - - - - - - - - =) 2527, s 
100°00 
The figure 9'15 for proteids is obtained by multiplying the 
nitrogen percentage, 1°55, by the factor 5:9, instead of the 
