972 
fermentation in a dunghill ; and the 
common practice is to make the 
applicutton of them to the soil in 
the state in which they are purchased, 
The season must be determined by 
the opportunity of purchase, and 
the quantity has been remarked un- 
der each article ; and as to soil, all 
animal substances act as manures 
powerfully on all. 
Woop asurs were found to bea 
manure, in consequence of some ex- 
periments undertaken to disprove a 
suggestion of Mr. Hazentratz, who 
thought that all alkalis were not 
manures, ‘The nature of them is 
well known, and wherever they 
have been tried they have proved a 
valuable manure. ‘Their property is 
to attract carbonic acid from the 
air; they are applied without pre- 
paration, and the spring is the pro- 
per season ; and forty bushels to the 
acre is the common quantity on all 
sous. 
PEAT ASHES are a common ma- 
nure in all countries where peat- 
bogs are found; their value usually 
depends on the blackness and den- 
sity of the peat, and the neighbour. 
hood of Newbury, in Berkshire, 
supplies the best : the usual quantity 
of these is ten or twelve bushels to 
the acre, but of other kinds from 
twenty to forty bushels have been 
used ; their eflect is greatest on dry 
friable soils, 
Coax asus are used all over the 
kingdom, from fifty to two hundred 
bushels to an acre; they are most 
effective when spread on clover, 
sainfoin, or other seeds, in the 
spring; and are beneficial on grass 
lands and green wheat. The cifect 
on them is considerable on the dry 
chalk lands of Hertfordshire. The 
knowledge of their preperties is 
very imperfect, 
ANNUAL REGISTER, 1806 
Soor is composed of oil, solute 
alkali, carbon, and earth ; ‘no won. 
der, therefore, that it should be 
found a very powerful manure. Its © 
component parts are so minute, 
that they may be washed into the 
ground by a single shower, and be~ 
come the immediate food of plants, 
Twenty bushels te the acre is the most 
common quantity, and the season of 
application is the spring. Green 
wheat and clover are much benefited 
by this manure, the effect of which 
is great on most soils, but least upon 
strong or wet clay. 
Prat ust, if the peat be black 
and solid, is resolvable into a 
greater proportion of hydrogen gas 
than most other manures ; it is also 
strongly attractive of humidity, 
which renders it very advantageous 
on dry sandy soils. he use of it 
as a manure is not general, but it is 
well-known, and much esteemed, in 
Bedfordshire and Hertfordshire. 
Porasn wAsre is a powerful ma- 
nure ; and ten loads, or 350 bushels, 
are commonly applied to an acre. 
Much good is produced by it on 
low meadows, and in general on 
all grass lands. | 
SUGAR-BAKERS’ WASTE iS sup-— 
posed to be a powerful manure, but 
its effects are not known from expe- 
riment ; it can be procured only at 
five or six places in the kingdom. 
.Tanners’ BARK, if useful. any- 
where, ought to beso on calcareous 
soils; mixed with lime it has been 
beneficial. But as the tanning 
principle is in all cases hostile to 
vegetation, whatever benefit is de- 
rived from tanners’ bark, must 
arise cither from the lime or the 
animal impregnation. Experiments 
do not recommend it. 
Matt pusr has been used with 
success wherever it has been ap- 
plied. 
