100 Artificial Manures for Swedes. 
On analysis the ground coprolites were found to contain in 
100 parts — 
Hygroscopic water 1*20 
Water of combination, and a trace 
of organic matter 3 "20 
Oxides of iron and alumina ... 4" 84 
Lime 39'81 
Magnesia 5'G8 
Phos])lioric acid 23 '48 equal to 47 "82 of bone-earth. 
Carbonic acid 5 '82 
Insoluble siliceous matter . . . 12- 5G 
Alkalies, sulphuric acid, and loss . 3 "41 
100-00 
The price of the dissolved coprolites made on the premises 
was 4/. per ton. At the present prices of the raw coprolites, 
the dissolved article Avould be more expensive. 
Plot III. Manured with 100 lbs. of bone-dust, or 7 cwts. and IG lbs. per 
acre. 
Cost of manure 5s., or 21. per acre. 
The swedes on this plot looked healtliy, but, it struck me, 
rather unequal. A distinct difference in the average size of the 
roots, as compared with the two preceding plots, soon became 
apparent to the eye when the root began to swell. On analysis 
the bone-dust was found to contain in 100 parts — 
Moisture 18-12 
Organic matters (gelatine and fat) 29 • 29 
Phosphates of liine and magnesia (bone-carth) 44*22 
Carbonate of lime 5*49 
Alkaline salts (chiefly common salt) 1'49 
Sand 1-39 
100-00 
Containing nitrogen 4*28 
equal to 
Ammonia 5.23 
Previous to crushing they had undergone no preparation what- 
ever, and contained consequently a great deal of fat, which cir- 
cumstance explains their slow action. 2s. more per quarter was 
paid for obtaining the bone-dust in a finer state than it is usually 
sold. A bushel on an average weighed 44 lbs., and the price 
per ton was bl. 12s. 
Plot IV. Manured with 93 lbs. of home-made su])erphosphate of lime, or 
at the rate of G cwts. and 72 lbs. ])er acre. 
Cost of manure 5s., or 21. per acre. 
The seed came up well, but at the fust stage of growth the 
swedes sowed with guano appeared somewhat better. At a 
later period the difference in the appearance of these two plots 
was less striking; and when the bulbs began to swell, it was 
