176 Comparison of Guano with other Manures. 
with guano ; and until the weights comdnced us of our mistake, we 
were under a strong impression that the guanos had beaten the 
dung. There remains for us to learn the value of these manures 
upon the succeeding crop of barley, for which purpose the 5 acres 
will be carefully distinguished, and the produce of each accurately 
measured. 
I remain. Sir, yours, &c. &c., 
David Barclay. 
Sastwick, February 12, 1845. 
Account of Experiments as to the relative Value of Farm-yard Manuie, African 
Guano, Peruvian Guano, Potter's Guauo, and Humphrey's Farmers' Compound, 
conducted on Eastwick Farm, in the County of Surrey. 
No. 
Description 
of 
Manure. 
Quantity 
used 
per Imperial 
Acre. 
Cost of Manure, 
Carriage, 
and Application. 
Produce 
of trimmed 
Swedes 
per Acre. 
Value 
of Produce 
at 15s. 
per Ton. 
Cost of 
Manure and 
Application 
per Ton 
of Swedes. 
1 
Farm-yard 
12 Tons 
At 5s. . £3 0 0 
Carriage, 14 0 
Spreading, 0 4 0 
T. cwt. qr. lb. 
9 7 3 20 
£ s. d. 
7 10 
$. d. 
9 4 
4 8 0 
, 2 
African Guauo 
3 cwt. 
At 6/. lOs. per ton, 
0 19 6 
Sowing, 0 2 0 
8 2 0 0 
6 1 6 
2 8t 
1 1 6 
3 
Peruvian Guano 
3 cwt. 
At 10/. 10s. 
1 11 6 
Sowing, 0 2 0 
8 0 0 0 
6 0 0 
4 2i 
1 13 6 
4 
Potter's Guano 
4 cwt. 
At 12/., 2 8 0 
Sowing, 0 2 0 
2 10 0 
8 17 2 8 
6 13 2 
5 7+ 
3 
Humphrey's Far- 
mers' Com- 
pound. 
3 cw t. 
At 12/., 1 16 0 
Sowing, 0 2 0 
5 17 3 0 
4 8 3J 
6 6 
1 18 0 
