156 
Superphosphate of Lime. 
dry season too that the advantages of early and vigorous growth 
are shown, when the plant may languish for weeks for want of 
rain with ordinary manures, and thus lose time that never after- 
wards can be compensated for. 
In a garden experiment tried on a small scale to show the 
effect of different preparations in forcing the young plant out of 
ground, I found the following results : — 
1. Vitriolized bone applied in solution above the seed, caused 
the plant to appear on the fourth day 
2. The same applied below the seed, brought up the plant on 
the fifth day. 
3. Vitriolized bones as compost brought up the plant on the 
sixth day, both when applied above and below the seed. 
4. Sulphuric acid and water below the seed, caused the turnip 
to make its appearance on the sixth day. 
5. Bone-dust below the seed brought up the plant on the se- 
venth day, the same time as it appeared where no manure was 
employed. 
In the above instances, with the exception of the fourth, the 
expense of the manure was the same in each case. 
General Conclusions. 
From the facts and reasons which we have detailed and urged 
in our preceding Essay, as well as from information supplied by 
previous experimenters, we may deduce the following conclu- 
sions : — 
1. That superphosphate of lime is the essential manure for 
turnips, and particularly for swedes. That with it alone a good 
crop can be raised ; but without it the turnip will not thrive, how- 
ever rich the manure may otherwise be. 
2. In preparing the mixture, the bones should be in as fine a 
state as possible. 
3. That sulphuric acid, from its greater strength and cheap- 
ness, is preferable to muriatic acid. 
4. That water, in the proportion of one-half the weight of the 
acid, should be first sprinkled over the bones. 
5. The proportion of sulphuric most economical to employ, 
should not be less than one-third, nor more than one-half the 
weight of the bones, and that probably the medium between 
these two quantities is most advantageous. 
6. That the mixture can be applied either diluted with a con- 
siderable quantity of water by the aid of a water-cart, or with 
ashes by means of an ordinary drill. That though the former 
may be inore speedy in its effects, the latter can be more conve- 
niently applied, and has the advantage of admitting the addition 
of a large quantity of ashes. 
