PATENTS LATELY ENROLLED.

hanging door, acts as a second door to the receiver, until drawn back by opening the snuffers, and then the valve resumes its place. There is likewise a representation of a piece of iron, which acts as a lever to draw the scraper forward and backward. One end of the lever is in serted in a hole; and the other end has an oval hole in it, and is held by a peg fixed in one of the shanks of the snuffers, near to its left edge; and, on account of the oval form of its aperture, draws forward the scraper at the opening of the snuffers, and pushes it backwards as the snuffers close. The door for emptying, the receiver is at the end of the snuffers, and opens and shuts by pressing the point of the shuffers upwards and downwards: this door is kept closed by an inside spring. On the point of the snuffers are two semi-oval cuts, one plain, and the other with a few sharp edges, intended as proper means of raising or removing splinters, or thieves, in the wick of the candle; and which may or may not be added at discretion, and are not at all connected with the invention as such.

MR. EDWARD MANLEY'S (UFFCULM,

DEVON.), for a Plough.

The plough described in this specification is denominated the "expeditiou plough," and is said to have this ad. vantage over every other inplement: that the same horse-power has more than double the effect in draught; and that the work it makes, is greatly superior to that of every other plough. It is worked in a beam, in the common way; and has three different sets of feet, which may be exchanged one for the other, as required. These are more or less in number, according to the size of the beam, and the different work for which they are intended. The ploughs are so constructed as to be used for different purposes, in the following manner :-The first sort, when set in shallow ground, will either scarify or spin; when set deep, they will draw themselves into the ground, working it up and pulverizing it at a great depth.-The second are used for the purpose of working the ground finer.-The third are used for turning the ground over in single or double ridges. The beam or wooden frame, in which the feet are fixed, represents that of the common plough, with the addition of two arins or side beams to take the side feet, and is worked by handles, and set by a wheel. The feet are in three sets: a foot of the first set represents a coulter with a share-point, having wings fixed beMONTHLY MAG. No. 196.

hind, or at foot of the second set; which exactly resembles the first, but is of a smaller size: a foot of the third set differs from the others only in having a single or double broad plate fixed behind the coulter. To the above implements a roller and harrow-brush are occasionally annexed.

MR. JOHN BARTON'S (ARGYLE-STREET,
WESTMINSTER), for a Lamp of a new
Construction.

This lamp is said to be constructed upon the natural unerring principle of the difference of gravity between two fluids; which produces a constant supply of oil, or other combustible fluid, to feed the wick thereof, founting in a perpendicular direction from a reservoir beneath the flame, having the quality of burning or consuming the whole oil, or other combustible fluid. The method of raising the oil, &c. consists in applying to the bottom of the column of oil, or other combustible fluid, contained in the lamp, the hydrostatic pressure of a fluid of greater specific gravity contained in an exterior reservoir, in which the lamp itself, with its contents and appendages, is made to float; and which fluid of greater specific gravity communicates with the interior of the lamp itself, and is at liberty to flow into it, subject to the counteracting hydrosta❤ tic pressure of the column of oil, or other combustible fluid, contained in the lamp, by means of an aperture in the bottom of it: and the patentee adds, "I am induced to believe, that by making the point at which the wick is placed, moveable; by the continual subsidence of the lamp on the exterior reservoir, during the combustion of the oil, &c.; and by the other improvements in the construction; I render it unnecessary,in the majority of instances, to employ for the heavier fluid any oue of greater specific gravity than common water, and in other respects accomplish the end proposed with greater advantage or convenience than the same has hitherto been done with."--Mr. Barton has given drawings to represent the whole lamp, and also the several parts of which it is composed. The lower part of a hall or staircase lamp, is a cylindrical vessel of thin brass or copper, the bottom of which is fitted on its lower extremity, either by a screw, joint, or otherwise. From the top of this vessel there issues a tube, communicating with it, to the su perior extremity of which the burner, or burners, are adapted. There is an airvessel or float, nearly, but not quite suf

ficientl

of

the oil down the sides of the burner, but apply the oil, which would otherwise be wasted by this means, to the purpose more copiously supplying the combustion of the wick. In order, however, both that no part of the oil which exudes from the wick during its combustion may be wasted, and that the disagreeable effects which would result from its flowing down the sides may be still more effectually prevented, Mr. B. attaches to the tube which constitutes the burner, at a convenient distance below the plate or ledge, a second plate or ledge, of the same figure, but of larger dimensions than the one already described. The tube which constitutes the burner, is perforated between the two plates with two or more horizontal circular rows of small apertures, surrounding such tube: by this contrivance, any sucli oil as escapes over the edge of the upper of the said plates, may be caught by the lower one, and by that means again brought into contact with the wick through the apertures; and also, the external air which is admitted through the apertures, and a certain quantity of which will, of course, rise through the interstices of the cotton to the lighted portion of the wick, will assist in promoting combustion.

ficiently, buoyant to support the whole of
the lamp (that is, the vessel with the
tube, and the burners attached to its su-
perior extremity) in water, or such other
fluid as it may be thought proper to use,
for the purpose of supporting the neces-
sary column of oil by its hydrostatie
pressure, when the cylindric vessel is fill-
ed with either oil,, &c. There is also an
additional float fitted on the tube towards
its superior extremity, which is so adjust-
ed as to be capable, together with an in-
ferior float, of supporting the whole of
the lamp. The floats may be made of
any buoyant substance, capable of being
adapted to a like purpose; such, for exam-
ple, as the lighter kinds of wood var-
nished, or cork: or they may consist of
tin-plate, thin brass, or any other thin
metallic plates, soldered up, so as to
form a hollow air-tight vessel. The ex-
terior part of the lamp serves to contain
the fluid, by the hydrostatic pressure of
which the necessary column of oil for the
supply of the burners at the superior ex-
tremity of the tube is to to be supported;
and in which the lamp itself, with its tube,
the burners, and the floats, are intended
to float when the vessel and tube are fill-
ed, either with the oil originally intro-
duced into it, or with such residue of it
as may from time to time remain uncon-
.sumed; together with such portion of the
water, or other fluid heavier than oil, by
the hydrostatic pressure of which the co-
lumn of oil is intended to be supported.
It must be observed that whatever be the
specific gravity of the heavier fluid, the
relative heights of the whole of the vessel,
with the tube, must be in a somewhat
greater proportion than the inverse pro-
portion of the specific gravities of those
two fluids,, to enable the cotton to pro-
duce, by its capillary action, a sufficiently
copious supply of the oil, &c. The pa-
tentee next gives a method for conveni-
ently filling the vessel; and he adds, that
the burner consists of a tube tapering up.
wards, to the upper part of which, and
not more than about one-half its diameter
below its superior extremity, there is at-
tached a small plate or ledge, concave
upwards, and projecting on every side
from the exterior of the tabe itself to a
distance equal to about one-half of the
diameter of such tube. The intention
and effect of this projecting plate or ledge,
are, to catch the small quantity of oil which
generally exudes from the wick of a lamp
that is sufficiently supplied, and by that
means not only prevent the unpleasant
fect which results from the flowing of

MR. WILLIAM KUTTON'S (SHEFFIELD) for a Method of making Sickles and Reaping Hooks.

The nature of this invention shall be described ucarly in the author's own words:-Take a piece of steel, haminer or roll it into a proper thickness, then cut or pare it into the form of a sickle or reaping-hook; this may be called the blade of the sickle or hook: then tooth the blade, if for a sickle, in the usual manner; next harden the blade in the hardening-mixture now used for saws, and give a temper or colour according to the quality of the steel of which it is made; then set, and grind it. The back may be made, and affixed to or upon the blade, in the following manner:-the blade being made, holes are to be pierced through that part intended to be axed to the back; then take a piece of iron or steel, and hammer or draw it into the form of the back of a sickle or hook, and fit it to the blade; afterwards, pierce holes in the back to correspond with those pierced in the blade, and fasten them together either with rivets or screws. Or the backs may be made and fastened to the blades in this way: take a piece of iron or steel, roll, forge, cast, or hammer, it to any

thickness,

1

LIST OF NEW PUBLICATIONS IN FEBRUARY.

As the List of New Publications, contained in the Monthly Magazine, is the ONLY COMPLETE-LIST PUBLISHED, and consequently the only one that can be useful to the Public for Purposes of general Reference, it is requested that Authors and Publishers will continue to communicate Notices of their Works, (Post paid,) and they will always be faithfully inserted, FREE of EXPENSE.