Horse-hoeing husbandry : $b or, an essay on the principles of vegetation and tillage. Designed to introduce a new method of culture; whereby the produce of land will be increased, and the usual expence lessened. Together with accurate descriptions and cuts of the instruments employed in it.Tull, Jethro
Science
Horse-hoeing husbandry : $b or, an essay on the principles of vegetation and tillage. Designed to introduce a new method of culture; whereby the produce of land will be increased, and the usual expence lessened. Together with accurate descriptions and cuts of the instruments employed in it.
Tull, Jethro
Agriculture -- Early works to 1800; Plows; Tillage
Another Difference there is between the Shape of these hinder Funnels
from that of the former, to wit, That each fore Side of the hinder
Trunks must not be quite so oblique as the rest; because then the upper
Edge of these fore Sides might be too near the Tenons of the Sheats,
and there might not be sufficient Wood betwixt them, to prevent the
Sheats from being torn out; a thing which has never happen’d, that I
know of. We sometimes make these hinder Funnels of a roundish Shape,
like a Cone inverted; except that the Part which is next the Sheat, is
not so oblique as the rest, for the Reason already given.
The only Advantage proposed by this roundish Shape is, that there is
less Wood taken out than from the square Corners, and therefore more
Wood for the added Pieces to be fastened to the Beams, than, in the
square Funnels.
M and N are Two Pieces of Wood, each Eleven Inches long, Two Inches
broad, and Two Inches thick: These are screw’d on near each End of the
Plank, by Two Screws and Nuts each: They stand parallel to the other
Beams, and have each a double Standard or Fork, O and P, in them,
perpendicular to the Plank; by which Standards the fore Hopper is drawn
and guided, in the manner as is seen in _Fig._ 21.
These Standards ought to be braced (or spurr’d) before and behind, and
on their Outsides; they never being press’d inwards, have no occasion
of Braces there: These are to be so placed, that when the Spindle is
in their Forks, it may be exactly over the Hole of the Funnel, so that
the Seed may drop into the Middle of it, when the Plough stands upon
an horizontal Surface, the Spindle being also exactly parallel to the
fore Edge of the Plank.
_Fig._ 10. is D in the Plough _Fig._ 1. It is Two Feet long, Two Inches
broad in its narrowest Part, and half an Inch thick in the thinnest
Part, and Two Inches at its Shoulders above the Plank. It is pinn’d
thro’ the Plank before the Funnel, having one of its Legs on each Side
the Tenon of the Sheat: It stands perpendicular to the Plank: Its only
Use is to hold the fore Hopper from turning upon the Spindle, being put
thro’ a thing (_Fig._ 22.) like the Carrier of a Latch, nail’d onto the
upper Part of the fore Side of the fore Hopper, in which thing this
Standard has room to play, or move side-ways, to the end that either
Wheel may rise up.
_Fig._ 11. is one of the hinder Standards, which being placed in the
Beam, as G or H, perpendicular to it, is driven into a Mortise, and
pinn’d into the Beam. It has a Shoulder behind, and another before, and
a Third on its Outside; which Shoulders serve instead of Braces, to
keep it from moving backwards, forwards, or outwards: It is Two Feet
Four Inches long, Two Inches broad, and an Inch thick: It is placed
with its broad or flat Sides towards the Sides of the Beams. It is made
so thin, because it should have the more room for the Hopper to play on
it; and therefore must have its Strength in its Breadth. The Part at
_a_ must stand foremost.
Public-domain text, read in full here on John Shaqi.
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