as a Manure for Turnips. 
61 
Nos. IS, 19, ami 20 were all miserably bad. 
Beyond these peculiarities, which were noted at the time, no 
particular variation was observed ; the dissolved bones manifesting 
their superiority to the end of the season, and being ready for use 
a month before the rest. 
The whole of the experimental plot was hoed by one person, 
and the land between the ridges regularly cleaned with the 
scuffler. 
On the 30th of January, 1845, the turnips were topped and 
tailed, and the gross weight of the produce of each plot ascer- 
tained ; the following being the results : — 
No. 
St. 
lbs. 
No. 
St. 
lbs. 
1. 
162 
12 per 1-lOlh of an acre. 
11. 
242 
2 per I- 10th of an acre. 
2. 
152 
2 
12. 
220 
10 
3. 
loO 
0 
13. 
257 
2 
4. 
171 
6 
14. 
231 
6 
5. 
124 
4 
15. 
248 
8 
6. 
257 
2 
16. 
233 
8 
7. 
229 
4 
17. 
188 
8. 
227 
2 
18. 
93 
3 
9. 
201 
19. 
92 
2 
10. 
154 
4 
20. 
90 
0 
Annexed is a tabular statement of the particulars of the various 
applications, and of their peculiar and final results upon the 
crop, calculated on the scale of an imperial acre. 
By comparing the results in this summary, and the peculiar 
circumstances connected therewith with each other, we obtain the 
following answers to the questions which it was our "object" 
to elucidate : — 
On the Theory of the Action of Bone Manure we learn — • 
1 . That the inorganic part of bones is the most valuable ferti- 
lizing constituent. 
In proof of this we find that No. 3 (48 st. of bones reduced by burn- 
ing to 26 St. 6 lbs.) gives a produce of 9 tons 7 cwt. 4 st., while No. 1 
(fresh bones, 48 st.) only gives 10 tons 3 cwt. and 4 st. per acre. 
Now, as it is well known that the animal oil must first leave the bone — 
must first be extracted by the plant, before the earthy part can decom- 
pose and be taken up by the roots, it is evident that in No. 1 the 
turnip has the use of all the animal, and some of the earthy part. In 
No. 3 the plant has the benefit of the earthy part only : and yet the 
difference in result is trifling. It is therefore evident that the earthy part 
alone is superior to the animal part alone. 
Again, compare the results of Nos. 6 and 8, where the bones are dis- 
solved, and both portions can have free action (for it will be evident 
that in No. 1 the earthy part has not been as ready for use as in No. .3, 
or it would, assisted by the animal matter, have greatly excelled No. 3 
in effect). 
In this comparison we find that 
