The Hills ’ Experiments on Wheat. 207 
85 per cent. ; \ cwt., 75 per cent. ; 1 cwt., 75 per cent. : silicate 
of potash, 2 cwt. per acre, 58 per cent. ; 4 cwt., 67 per cent. : 
silicate of soda, 2 cwt. per acre, 87 per cent. ; 4 cwt., 62 per cent. 
As regards the appearance of the plants, the chief thing to 
note was that the soaking of the seed with sulphate of 
manganese showed a darker colour in the leaves, this not being 
the case with the iron salts. On April 20, the number of 
plants was reduced to six in each pot. The plants treated with 
the silicates of potash and soda looked at first decidedly 
better than the untreated ones, and of the two sets the silicate 
of potash had the advantage. These appearances were, 
however, hardly maintained as growth went on. 
On August 3, the crops were ready for cutting ; measure- 
ments of length of straw and ear were taken, and the plants 
photographed. The produce was cut on August 5, and the 
grain separated later on and weighed. The principal results 
are contained in Table I., below. 
Table I. — (a) Influence of Sulphate of Manganese and 
Sulphate of Iron on Wheat , 1904 ; ( h ) Influence of 
Silicates of Potash and Soda on Wheat , 1904. 
Applications 
Percentage 
of 
germination 
Length 
of 
straw 
Length 
of 
ear 
Weight 
of 
corn 
Weight 
of 
straw 
1. Untreated. .... 
Per cent. 
80 
Inches 
29-17 
Inches 
2-84 
Grammes 
13-59 
Grammes 
21-79 
2. Seed-soaking, sulphate of man- 
ganese, 1 per cent. 
94 
26-67 
2-76 
13-34 
21-29 
3. Seed-soaking, sulphate of man- 
ganese, 2 per cent. 
92 
29-10 
2-62 
13-80 
21-38 
4. Seed-soaking, sulphate of man- 
ganese, 5 per cent. 
73 
28-09 
2-83 
13-84 
24-24 
5. Seed-soaking, sulphate of iron, 
1 per cent. .... 
88 
3106 
2-81 
10-77 
18-75 
6. Seed-soaking, sulphate of iron, 
2 per cent 
75 
32-18 
2-96 
14-84 
25-27 
7. Seed-soaking, sulphate of iron, 
5 per cent. . 
63 
31-51 
2-84 
16-36 
27-37 
8. Sulphate of manganese, \ cwt. 
per acre .... 
88 
32-93 
2-87 
15-76 
26 23 
9. Sulphate of manganese, ^ cwt. 
per acre .... 
86 
29-23 
2-80 
15-62 
25-87 
10. Sulphate of manganese, 1 cwt. 
per acre .... 
80 
30-53 
2-65 
13-35 
22-41 
11. Sulphate of iron, \ cwt. per acre 
85 
31-20 
2-88 
12-46 
20-12 
12 - 
75 
28-03 
2-77 
14-40 
23-72 
1 3 1 
JJ JJ A JJ JJ 
75 
30-39 
2-84 
14-72 
22-87 
14. Silicate of potash 2 ,, ,, 
58 
30-27 
2-90 
14-00 
25-19 
15. , , )1 4 , , J J 
67 
29-52 
2-87 
16-26 
27-41 
16. Silicate of soda 2 ,, ,, 
87 
32-84 
2-84 
12-83 
24-19 
17. ), o 4 ,, ,, 
62 
3017 
2-92 
17-56 
28-56 
