Constitutional Whig. [volume] (Richmond, Va.) 1824-1832, 1825-04-01

The power applied, as stated in the table &c tha,
winch was used while the plough was moving with
ordinary velocity; and all tue experiments here
recorded, were made after the furrow had been form
cd. All the operations were several times reneat
ed, and the mean OF the results taken. The ground
"here the experiments were made is composed princ
paly OF sand with small proportion of clay and yep
table matter, and covered with very stiff oreen
swatd, which however is brittle, in consequence of be-
ing composed mostly of sand The specific gravity
OF the earth before it broken up was found TO he
lO4 pounds per cubic foot.
Gin examining the ploughing which had been per-
formed with the several poughs by horses a most stri
king difference was Observed. The plougbs numbered
and 3, greatly surpassed either of the others the nr
row slice was raised and turned over in one con-
tlnued and unbroken belt and laid in its whole course
parallel to the urrow. The earth IN its passage I'D
the mould of these ploughs, and while turning over an
feared TO be so be t,oisted as to crack or break if
INTO very small parts without tearing the syard asun
der and I'D such manner TO leave large cIods but
to PulverHe the whole. But little difference was OBJ
served IN the work performed by these two poupbs
No. ] was however, thought superior. Ploughs num-
bered and 6, appeared TO break off the furroy slice in
lengths from ~ to 10 feet, and to cast them off
separately IN direction oblique to the furrow The
Poughs numbered and appeared to break the Grrov
slice IN very uneven and irregular Masses and to throw
them OIL IN all directions leaving large unbrocn cods
as bard they before being moved by the plough
1t appears from this quotation and the above table
that Mr. DavIs's plough found to- be decidedly SUI
pcror to the others in most respects and generally SUI
PcriOr 10 all requires less power, and performs bet
tor work 1t also unItes cheaPuess, strength and du
rablty; as appears from the following deception
"lhe mould and land side, which forms the man body
CONSISTS oil one piece the share, cutting edge or point
IS another piece; and the heel shoe, forms the third
piece The two latter made separate that they
may be renewed, as they do not wear long as the
other part Tho three pieces all Of cast iron and
az united by two screw bolts The beam and handles
are united together and secured to the est iron by
means screw bolts, without making any mortices or
lemons THIS method Of uniting the several parts of the
plough, and which found in that Of Mr. Davis alone we
consider great improvement unites simplicity and
cheapness OF construction, with increased strength and
durability This method also gives facilities winch are
not possessed by any other have SEEM for adjusting
Tie plough, by making il incline 10 OF from the land
or making 1t penetrate less Deep at the plea
sure of the pOughman."
several experiments were made with a view of de-
terInIn"g what change produced 10 the power by a
variation IN the depth of the furrow or in the velocity
with winch The plough is drawn. BY adding one fourth to
the depth OF furrow without varying its width the pow