Artificial Manures for Swedes. 
103 
small quantities at the rate of 5/. per ton ; but I am told in large 
quantities it may be had at 3/. a ton. At tlie latter price it 
certainly is very cheap and well worthy tlie attention of the 
farmer, as it is a powerful manure, wliicli, however, is more 
economically applied to wheat or grass-land than to turnips. 
Plot VIII. Unmanured plot. 
As mentioned already, a very great difference was soon per- 
ceptible between this and most manured experimental plots 
(except the economical plot). The swedes were very small, but 
otherwise in good condition. 
Plot IX. Manured with 180 lbs. of commercial dried night-soil, or at the 
rate of 12 cwts. and 96 lbs. per acre. 
Cost of manure 5a\, or 2/. per acre. 
No difference in the probable yield of this plot and the next 
could be observed. Plots IX. and X., however, did not pro- 
mise so good a crop as Plots I., II., VII., and especially IV. 
The effect produced by the dried night-soil was not so great 
as might have been expected. Pure night-soil is a powerful 
manure, which contains a considerable proportion of phosphoric 
acid, and for this reason ought to benefit root-crops in a decisive 
manner. It must be borne in mind, however, that the dried 
night soil was a commercial article, which, like many commercial 
articles, possessed a better name than it was entitled to by its 
composition. For the preparation of this manure a good deal of 
water was retained, and no doubt a large proportion of rubbish 
besides common salt was employed, as will be seen by glancing 
at the subjoined analysis : — 
Composition of Commercial dried Night- Soil Manure. 
Water 19-712 
Organic matters 17 "484 
Carbonate of lime 9 '229 
Magrnesia '168 
Oxides of iron and alumina 20 "061 
Phosphoric acid 4' 399 
Common salt with some sulphate of soda and potash . 11 "864 
Insoluble siliceous matter (sand and brick-dust) . . 16*941 
99-858 
It was sold at 3/. 2s. per ton. 
Plot X. Manured with a mixture of 1 bushel of soot, 30 lbs. of guano and 
dissolved coprolites, and bone superphosphate to make up the 
5s. expenditure. 
Cost 5s., or 21. per acre. 
Guano, dissolved coprolites, and bone-superphosphate, are 
of the same description as the materials used for the other 
experiments. 
