nary fertilizer. This report has just been published, and the
following is a synopsis of the results. The experiments were arranged
under the following heads--

1. To show the natural produce of the land, one part was to have no
manure whatever.

2. Was to have twelve tons per acre of farm-yard dung.

3. Was to have six tons of dung, and one cwt. each of guano and
dissolved coprolites; and

4. Was to have two cwt. of guano and two cwt. of the coprolites.

Other substances might be tried as additions, but these were to be the
standard experiments.

Mr. Cholmeley's turnips, grown on a loamy soil had the heaviest crop on
No. 3, the dung, coprolite, and guano, beating the farm-yard manure by
some 5-3/4 tons per acre.

Mr. Johnson's experiments were tried with various manures singly; and
his Peruvian guano gave the greatest weight of the class of substances
tried; but 10 cubic yards of farm-yard manure had previously been
applied to the whole land.

Mr. Maulevere's heaviest weight, also applied singly, was with the 12
tons of dung; but only 14 cwt. more than the dressing with 2 cwt. of
coprolites. This soil was a light clay.

Mr. Newham's on a limestone soil, were the heaviest with No. 3--the
same as Mr. Cholmeley's--and were 16 cwt. heavier than an application of
dung alone.

Mr. Outhwaite's, on a hungry gravel, were the heaviest, with 9-3/4 tons
of dung and 2 cwt. of guano, for all the land had been dunged at this
rate, and exceeded 14-1/2 tons of dung by 2 tons 9 cwt. per acre.

Mr. Scott's were the heaviest on No. 4,--the guano and coprolites, and 1
ton 7 cwt. more than 20 tons of dung,--his soil was a strong loam.

Mr. Wailes's were the heaviest, with 4 cwt. of coprolites, showing an
increase over 20 tons of dung of 2 tons 9 cwt. per acre; the soil is a
useful loam.

The first fact which strikes the observer, is, that as a general rule,
there is not only an addition to the crop by the addition of those
artificial manures, but there is, in some cases, more absolute crop
produced by them than by farm-yard manure alone.

Now to bring this to the test of figures, the coprolites at L5 per ton,
and the guano at L10 per ton, will be at the rate of 2 cwt of each, L1
10s per acre. Now assuming this to be equal to 20 tons of dung per acre,
we should require to be able to produce the dung at 1s 6d per ton to
cost us the same money. But it can be neither produced nor purchased at
any such money. In the whole of th