Expcrivwuts nj)0)i Swedes. b3 
J'lot 16. j\Ianiired irith acts, of Common Salt. 
tuns. cwts. qrs. lbs. 
rvoducc 15 IG 1 0 
Incieasi- 1 1 o 24 
Common salt, it seems, lias had little or no effect in this ex- 
periment; but it docs not follow that it may not be beneficially 
applied to swedes in conjimction with other fertilizing sub- 
stances. On analysis the salt yielded the following results: — 
Moisture T'fiG 
Organic matter "09 
Snlpluitc of lime .. .. 3-44 
Clilovido of mamicsiiim ..' "ll 
Chloride of sodium 88'70 
100-00 
Plot 17. Manured with 3 cids. of Dissolved Bone-ash. 
tons. cwts. qrs. lbs. 
Produce 20 15 2 24 
Increase G 11 20 
In preparing the manure used in this experiment, 100 lbs. of 
good commercial bone-ash were mixed with 70 lbs. of sulphuric 
acid ; and after some time this mixture was dried up with 50 lbs. 
of sulphate of lime. By these means an excellent superphosphate 
was obtained, as will be seen by the following analysis. The 
manure, being made of bone-ash, did not contain any ammoniacal 
salts nor appreciable quantities of nitrogen : — 
Composition of Dissolved Bone-ash. 
Moisture '.. .. 5'65 
Organic matter 3'51 
Bi-phospbate of lime .. ' 19-64 
Equal to bone-earth rendered soluble .. (30'G5) 
Insoluble phosphates -86 
Hydrated sulphate of lime G4-9G 
Alkaline salts 1-83 
Sand 3-55 
100-00 
The result of this plot affords another proof that a good 
crop of swedes may be obtained with a superphosphate in which 
all the phosphates are rendered soluble, and which contains no 
nitrogenized matters. Some persons think that a good super- 
phosphate should invariably contain insoluble as well as soluble 
phosphates, for they imagine that the latter are washed away too 
rapidly, and that therefore the superphosphate should contain 
insoluble phosphates, to sustain, as they say, the after-growth of 
the plant. It is a mistake to think that soluble phosphate is 
very readily washed away into the subsoil, and that it there- 
G 2 
