16 Artificial Manures for Swedes. 



small quantities at the rate of 57. per ton ; but I am told in large 

 quantities it may be had at 3L a ton. At the latter price it 

 certainly is very cheap and well worthy the attention of the 

 farmer, as it is a powerful manure, which, 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 Ibs. of commercial dried night-soil, or at the 



rate of 12 cwts. and 96 Ibs. per acre. 

 Cost of manure 5s., 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 reat 

 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 



Magnesia *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 37. 2s. per ton. 



Plot X. Manured with a mixture of 1 bushel of soot, 30 Ibs. 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. 



