USEFUL) PROJECTS. 
flour in this bread is as great as if 
24lb. of raw potatoe had been 
mixed with 12lbs of wheaten flour ; 
and, compared with boiled pota- 
toes, it is as great as if 18lb. of 
potatoes had been mixed with 12lb. 
of wheat flour. 
From the foregoing statemeuts, it 
is notpresumed that much farther in- 
formation isimparted, than may have 
been gathered from some former ac- 
counts of bread-making from a 
mixture of such flours, except as to 
the mode of preparing the potatoe 
flour. Neither is it at present sup- 
posed that for common use, when 
corn is not dear, the potatoe will 
_-Supersede the use of neat wheat 
flour for family bread. 
But in very dear times, when it 
may be used in some places to great 
advantage, the most economical 
mode of doing it is important ; and 
the process of steaming, kiln-dry- 
ing, grinding, and dressing, seems 
excellent. If equal quantities of 
wheat and potatoe flour are found 
to make very good bread, and the 
potatoe to have the effect of cone- 
flour in the mixture; this may be 
set down as a sufficient regulation, 
and a valuable fact. 
But what is of great consequence 
to be known, and fully noticed is, 
that the flonr of the potatoes so 
prepared, if barrelled up, and kept 
in any common dry place, will re- 
tain its virtue longer, cither on land 
or at sea, than the other sorts of 
flour made from grain; .in short, 
from frequent appearances, and 
well-attested facts, the flour of this 
vegetable, prepared as aforesaid, 
seems to possess the singular gua- 
lity of being almost imperishable. 
In addition to that quality, the 
power of preserving potatoes in 
barrels, after being kiln-dried, either 
965 
when whole or cut into parts, for 
the use of the table in long voyages, 
is very important; and it is found 
that, after being so preserved, they 
are capable of being again boiled 
soft, and served up as a vegetable — 
at table, retaining much of their’ 
original flavour, consistence, and 
other qualities. 
An Essay on Manures. By Arthur 
Young, Esq. Abridged from the 
Bath Papers, Vol. 10. 
This essay obtained the reward 
of the first Bedfordean medal, which 
was voted by the Bath Agricultural 
Society to the author who produced 
‘* the best essay, founded on prac-~ 
tical experience, on the nature and 
properties of manures, and the mode 
of preparing and applying them to 
various soils: in which essay shall 
be peinted out the cheapest manner 
of collecting and preparing the dif- 
ferent kinds of manures, and the 
state, season, and quantity in which 
they should be applied.” In this. 
essay the author considers the sub- 
ject of manures under the several 
heads of their nature, their proper- 
ties, the mode of collecting them, the 
state in which they are applied, thé 
manner of application, the season 
when applied, the quantity required, 
and on what soils the respective 
kinds are most beneficial. In class- 
ing the various bodies which may 
be applied as manures, he divides 
them into, ' 
1. Such as are dry or made ona 
farm ; and, 
2. Such as are usually purchased, 
Marte, of the manures of the 
first class, is the most common in 
England, in some one of the deno- 
minations of clay, stone, or shell 
3Q3 marle ; 
