104 Experiments at Burcott Lodge Farm, Leigkton Buzzard. 
Composition of a Sample of Precipitated Phosphates from a Manio- 
facturcr of Glue in Cheshire, at 51. per ton. 
Moisture 28-75 
Water of combination and a little organic) o.or 
matter ^ » 
*Phosphoric acid 31 '44: 
Lime 29-80 
Magnesia, &c 1-76 
100 -CO 
*Equal to tribasic phosphate of lime .. .. C8-C3 
Composition of a Sample of Chalk for Swede Experiments at Wohum. 
Moisture '75 
Carbonate of lime 92-21 
Carbonate of magnesia "35 
Oxide of iron and alumina 1"29 
Alkalies, &c "41 
Insoluble matter 4*99 
100-00 
IX. — Experiments at Burcott Lodge Farm, Leigkton Buzzard^ 
on the Growth of Swedes, with dissolved and finely-ground 
coprolites, with dung, and loitli ground and dissolved coprolites 
in various proportio?is with dung. By R. Vallentine. 
The soil upon which the experiments were tried is a rather 
light claj-loam, containing a good many small flints ; elevation 
about 500 feet above the sea-level. The ground has had no dung 
for 31 gears. Ten plots of one-sixth of an acre each were 
devoted to the experiments on swedes. The following table 
will show the results calculated per acre : — 
Plot. 
Dung. 
Dissolved 
Coprolites. 
Dry Coprolites. 
Weight of Crop. 
tons. 
cwts. qrs. lbs. 
cwts. qrs. lbs. 
tons. cwts. qrs. 
1 
20 
16 2 0 
2 
10 
10 10 0 
3 
10 
3 0 0 
13 8 0 
4 
10 
5 0 0 
11 4 0 
.5 
Nothing 
Nothing 
Nothing 
8 2 0 
6 
9 0 0 
9 4 0 
7 
8 
6 0 0 
3 0 0 
10 8 0 
9 0 0 
9 
3 0 0 
10 1 0 
10 
Nothing 
Nothing 
Nothing 
8 0 0 
The spring was suitable for preparing the land, which required 
