122 Some Field Experiments on the 
form of carbonate. It was therefore resolved to lime this field, 
and accordingly 470 bushels of lime Avere spread over the two 
acres, and after due exposure to the air, well ploughed in, and 
harrowed. One of the two acres marked out was dunged — as 
in the previous years' trials — with 10 tons of dung (short dung, 
made by cows and horses), and during May and June the dung 
was ploughed in, and the field drag-harrowed and light-harrowed 
four times. 
Composition of Soil dried at 212^ Fah\ 
*Organic matter and ■\vatcr of combination .. 8 "521 
Oxide of iron 6-066 
Alnmina .. .. 4 -364: 
Lime * 970 
Magnesia • 500 
Potash ■112 
Soda '176 
Phosphoric acid '141 
Sulplnu'ic acid '137 
Siliceous matter, &c 78 '353 
100-000 
* Containing nitrogen -21G 
The artificial manures were sown broadcast on the 12th of 
June, the land being immediately afterwards light-harrowed 
and rolled ; on June 15th, 3J lbs. per acre of swedes were 
drilled, as in the preceding year. 
The manures used had the following composition : — 
SuperpJiospliate (^Dissolved Coprolites), 
Moisture 14-60 
Water of combination, &c 9-61 
Monobasic i>liosphatc cif lime 17-78 
Equal tribasic ])liospliate of lime rendered) ^^r- qq> 
soluble by acid ^(,-/ »dj 
Tnsoh^ble phosphates 3*38 
Sulphate of linie, &c 46-67 
Siliceous matters 7*96 
100-00 
Ground Coprolites. 
Jfoisture '68 
Water of combination, &c 4-86 
*riiosplioric acid 25-97 
Lime 43-73 
Oxide of iron, alumina, carbonic acid, il-c. '.. 16-91 
Sihceous matter 7-85 
100-00 
E(pal tribasic phosphate of lime .. .. 5G'G9 
