1810.) 
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 represen- 
tation 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 for- 
ward the scraper at the opening of the 
snuffers, and pushes it backwards as the 
snuffers close. The door for tmptying 
the receiver is at the end of the snutters, 
and opens and shuts by pressing the point 
of the snuffers 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 con- 
nected with the invention as such. 
EE t . 
MR. EDWARD MANLEy’s {UFFCULM, 
‘ DEvoN.), for a Plough. 
The plough described in this spe- 
cification is denominated the “ expedi- 
tion 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 thatthe 
work it makes, is greatly superior to that 
of every other plough. It is worked ina 
beam, in the common way ; and has three 
different sets of feet, which may be ex- 
changed one for the other, as required. 
These are more or Jess in number, accord. 
ing to the size of the beam, and the dif- 
ferent work for which they are intended, 
The ploughs are so constructed as to be 
used for different purposes, in the follow- 
ing manner :—The first sort, when set in 
shallow ground, will either starify or spin ; 
when set deep, they will draw themselves 
into the ground, working it up- and pul- 
_ Vverizing 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 singie 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 arms or side beams to take the 
side feet, and is worked by handles, and 
set bya wheel. The feet are in three sets: 
a foot of the first set represents a coulter 
with a share-point, having wings fixed be« 
Montury Mac. No, 196. 
Patents lately Enrolled. 
153° 
hind, or at foot of the second set; which 
exactly resembles the first, but is of a 
smaller size: afoot 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 harraw-brush are occasionally 
annexed, 
eee 
MR. JOHN BARTON’s (ARGYLE-STREET, 
WESTMINSTER), for a Lamp of a new 
Construction. | 
This lamp is said to be constructed 
upon the nataral unerring principle of the 
difference of gravity between two fluids; 
which - produces a cunstant 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 oc 
consuming the whole oi!, or other com- 
bustible fluid. The method of raising the 
oil, &c. consists in applying to the bottom 
of the column of oil, or other combusti- 
ble fluid, contained in the lamp, the hy- 
drostatic pressure of a fluid of greater 
specific gravity contained in an exterior 
reservoir, in which the lamp itself, with its 
contents and appendages, 1s made to float 5 
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 columin of oil, or other 
combustible fluid, contained in the lamp, 
by means of an apertare in the bottom*of 
it: and the patentee adds, “ 1 am induced 
to believe, that by making the point at 
which the wick is placed, moveable; b 
the cqntinual subsidence of the lamp on 
the exterior reservoir, during the combus- 
tion of the oil, &c.; and by the other ime 
provements in the construction; I render. 
it unnecessary,in the majority of instances, 
to employ for the heavier fluid any one 
of greater specific gravity than common 
water, and in other respects accomplish 
the end proposed with greater advantage 
or convenience than the same has hi- 
thertu been done with.”—Mr. Barton has 
given drawings tu represent the whole 
lamp, and also the several parts of which 
it iscomposed. ‘The lower part of a hall 
or staircase Jamp, is a cylindrical ves- 
sel 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, te the su- _ 
perior extremity of which the burner, gr 
burners, are adapt@d. There is an air- 
vessel or float, nearly, but not quite suf- 
U ficient 
