a a) 
(Dec. 1, 
NEW PATENTS LATELY ENROLLED. 
Sa 
MRS. ELIZABETH BELL’S,(HAMPSTEAD,) 
jor a METHOD of SWEEPING CHiMNEYS, 
and of improving their Conftruction. 
HERE are three things included in 
aE the {pecification of this patent: the 
firfi refpects cleanfing chimneys ; the fecond 
extinguifhing them when on fire; and 
the third is a plan of building the chim- 
ney fo as to prevent danger to the houfe. 
from the foot in it taking fire. 
In a former number of this work we 
have given a decided opinion, that an 
invention to fuperfede the neceffity of 
climbing-boys, if it 'meet the public ex- 
pectation, mut effe&t its operation from 
. below; and that no apparatus will be 
confidered as adequate to the wants of 
fociety, if it be necefiary either to alter 
the ufual form of the chimney, or to have 
accefs to the top of it from the outfide or 
roof. On this account we are forry that 
we cannot give a more favourable report 
of this lady’s invention, which requires a 
bar or bars to be placed acrofs the upper 
opening, im order that a chain, with pul- 
Jeys or rollers, may be made to pafs, with 
a brufh attached to it, upward and down- 
ward, to perform the operation. 
The method which fhe fuggeits for ex- 
tinguifhing chimneys on fire, 1s by means 
of a tin or other incombuftible veffel, 
having a valve in the bottom, opening up- 
wards, and which may be fo contrived as 
to be fent up the chimney by the ehbain, 
full of water; and when higher than the 
place on fire, the valve is to be opened, 
and the water, by the peculiar ftruéture of 
the hole, will fpread on all fides. of the 
chimney, and thus extinguifh the burning 
foot. 
The improvement in the conftruction 
of chimneys, is by the ufe of large hollow 
blocks, of a dimenfion equal to the fize of 
the chimney ; thete are to be made to fit 
into, or to lop over, one another, and the 
inter ftices to be filled with mortar, terrace, 
loam, &c. It is perfeétly evident, that a 
chimney built in this manner would bea 
complete fafeguard from the various acci- 
dents which are perpetually happening in 
chimneys as they now exift. In thefe, 
bricks get loofe and fall down, and thus 
a communication is opened between the 
chimney and the timbers in the houle; 
and of courfe, if the foot take fire, the 
builcing muft inevitably fhare the fame 
fate. 
Obfervation.—Sincé our laft notice of 
this fubject, the fociety for fuperceding 
the neceffity of climbing-boys, &c. have, 
by public advertifement, recommended 
Mr. George Smart's apparatus as the moft 
efficient : an account of this was given in 
the Monthly Magazine for June laft ; and, 
from repeated trials, there feems no doubt 
but that it is calculated to anfwer every, 
purpole required in the bufinefs of. chim- 
ney-[weeping. 
MR. LAWRENCE HOLLISTER’S, (MARY~ 
LE-EONE,) for MACHINERY for IMs 
PROVING ROADS. 
This invention confifis of two or more 
wheels, double tyred, on an iron axle- 
tree or axle-trees, on which are placed 
fprings, fapporting a large board called 
the bed or bottom; to this is faftened an 
angular piece of iron, the lower part of 
which reprefents the edge of a knife, with . 
three uprights in the fame form, working 
through the bed in fpring fockets,. by 
means of a rack ; which rack has holes to 
put pins in the focket, as alfo three other 
fockets inthe fame masner, to which are 
attached two curved or femi-circular irons 
called rutlers, the bottoms of which are 
formed as the angular one, into which, 
by the motion of the machine, the dirt, 
gravel, or earth, is collected from tne fides 
of each rut or furrow made by the wheels 
of carriages, and returned through an open 
part in each rutler into the ruts or furrows, 
{fo continuing the gravel on the road. Be- 
bind the rutlers is a board, called the tail- 
board, fecured to the bed, to which a har- 
row is fixed, to level new-made gravel, 
and may be ufed or not at pleafure. From 
the outfide of each rutler, (they taking the 
ruts or furrows made by the wheels of 
carriages,) as alfo from the front point of 
the angular iron to take the middle of the 
road, are faftened chains or ropes that 
hook to the front of the bed, or to the 
fhafts, or other parts of the machine, as 
preventors, when the roads are fo heavy 
as to endanger the works. At the extreme 
ends of the tail-board, or to the bed, is 
faftened a roller or rollers, to take the 
road fo levelled, as before defcribed by the 
rutlers, to prefs and roll it, occafioning 
the moifture to rife and run off, thereby 
making it more firm without fcraping it, 
-confequently will require much lefs gravel 
than by the prefent method of {craping 
roads. 
The patentee has adopted other modes 
to produce the fame effect ; as, for inftance, 
the fixing the bed or bottom fo as to be 
; drawo 
