102 
Artificial Manures for Swedes. 
This manure, it will be observed, consists principally of 
crystallized green viti'iol and bi-sulpliate and sulphate of soda. 
These sulphates of soda are obtained at a cheap rate, as a refuse 
in several chemical manufactories. Both the crystals of green 
vitriol and Glauber salt or sulphate of soda contain much water 
of crystallization ; hence the large amount of water (36^ per 
cent.) in a tolerably dry substance. The economical manure has 
a strongly acid taste and reaction, and might therefore be sup- 
posed to contain a great quantity of soluble or acid phosphate of 
lime ; but whilst it contains only about 7-lOths per cent, of 
ammonia, phosphoric acid is excluded entirely from its com- 
position. We need not, therefore, feel astonished that it pro- 
duced scarcely any effect upon swedes. 
The price at which the economical manure sold last season, 
and is again sold this season, is 121. per ton. Its constituents 
can be furnished at a1)out 3/. a ton ; the manufacture of a manure 
of the above composition thus might even pay well if sold at 
51. per ton instead of 121. per ton, its actual price. 
Plot VI. Manured with 120 lbs. of nut refuse, or at the rate of 8 cwts. 
64 lbs. per acre. 
Cost of manure 5s., or at the rate of 21. per acre. 
The swedes upon this plot had as healthy an appearance as 
any of the experimental plots, and it was difhcult to observe 
any difference in the relative average size of the bulbs of this 
plot and those of the next and the tenth plot. 
This refuse was the powdered cake of an oily nut, probably 
cocoa-nut. It was submitted in my laboratory by my pupil, 
Mr. Louch, to a partial analysis, who found in 100 parts — 
Water 1 1 • 60 
Organic matters 79*1"2 
Inorganic matters (ash) 9 '28 
100-00 
This quantity of organic matter on combustion gave in two 
experiments — 
1 Ex]). 2 Exp. Average. 
Nitrogen 4-826 4-90 4-863 
In the 9"28 of ash were found — 
Earthy phosphates 4*12 
Phosphoric acid, combined with alkalies "13 
Sand and soluble silica 2*42 
Alkalies, magnesia, &c 2-61 
9-28 grs. 
It will be observed that this nut-cake manure contains a very 
large amount of nitrogen, and also a quantity of phosphates and 
alkalies which is by no means inconsiderable. It was sold in 
