7802.) 
he defcribes the fhape which he conceives 
the beft adapted for the furnaces ufed in 
this manufacture, yet he expects no exclu- 
five privilege on that account. ‘What he 
lays claim to as an inventor, is the con- 
ftruétion of a building in which the fur- 
nace is, except the chimney, completely - 
included, fo that the whole heat from the 
fire muft be employed in the operation. 
The grate of the furnace is fo confiructed, 
that all the air confumed, muft pals thro’ 
the lower part of it; by which means it 
is faid, that there is a faving of at leaft one 
third part of the coals; and the glafs, by 
keeping a regular, as well as a ftrong, 
heat, is found to be of a fuperior quality 
to that made in the common way. As 
the heat of the room which includes the far- 
nace, is during ‘the operation infufferably 
great, iron or other doors are made, for the 
convenience of perfons going in and out 
to overlook and attend to the procefs. 
Obfervation.—The idea of preventing 
the accefs of the external air to any part 
of the fire, except at the bottom of the 
grating, is not new; it has, for feveral 
years palit, been adopted by Lord Stan- 
hope, in burning lime, with which. he 
makes a mortar, not inferior, perhaps, 
to that of the ancients fo much cele. 
brated. 
[ === ) 
MR. WINTER'S PATENT (SHACKLE- 
WELL) for a certain MANUFACTURE 
for covering the FLOORS of ROOMS, 
and .alfo for covering and packing 
GoODs, Ge. 
This new manufacture is compofe 
of wafte tan or bark, after it has been: 
ufed by the tanner ; threads and {crapings 
of all kinds of leather; and the fhort. 
hair of animals. The tan, and the leather, 
are tobe well cleaned; and by certain pro- 
ceffes, the formeris to be reduced to fibres, 
and the latter to. a pulp; the hair is to 
be wafhed and feparated, fo that the ingre- 
dients may be rendered fit for uniting with 
each other very completely. Being thus pre- 
pared, they are mixed together in the pro- 
portion of four parts of tan, two of lea- 
ther, and one of hair, with five pounds 
of refufe tow, wadding, or wool, to every 
hundred weight of the mixture. The 
whole is then to be intimately blended 
together, and conveyed into vats or -re- 
‘ceivers containing warm water, in which 
a fmall portion of glue is diffolved. » In 
this ftate it is moulded in frames, and the ' 
remaining part of the procefs is very much 
like that made ufe of in the manufacture 
of paper. 
. New Patents lately enrolled. 
TER) for a METHOD of making a@ 
BRITISH BARILLA, 
and of obtaining a greater QUANTITY 
of ALKALI thax hitherto difcovered. 
The method adopted by Mr. How- 
ard for obtaining alkali, is by faturating 
with quicklime the afhes. made 
tron, common-falt, black-afhes of the 
foap-boilers lie, kelp, tobacco-afhes, &c. 
cc. To thefe fubftances, being made: 
fufficiently fmall by grinding, pounding 
or rolling, to pals through a fine fieve,- 
is to be added a certain proportion: of 
coke, cinders, charcoal, or any other 
combuftible fubftance, free from fuiphur, 
and reduced to powder. 
dients are to be moft intimately mixed, 
and a layer of them to be fpread on an 
even floor, to which is added a layer of 
quicklime. The mafs is then to be 
fprinkled with as much common water, 
brine, lie, or fea-water, as it will abforb. 
Other layers are to be added at pleafure ; 
and when the heap is made, it is to becut 
down, while warm, andto be reduced, by 
means of water, lie, fea-water, &c. ta 
the confiftence of ‘mortar, then dried en 
iron plates or pans; and afterwards 
fluxed in a reverberating furnace, which 
is the finifhing part of Mr. Howard’s ope- 
ration in producing his Britifh barilla. 
He gives in the Specification the propor- 
tions which he thinks may be moft advan- 
tageoufly ufed ; but as on this point there 
may be a diverfity of opinions, he defires; 
it to be underftood, that the faturating by 
quick-lime any of the ingredients men-- 
tioned by him, for the purpofe of obtain- 
ing alkali,will be deemed an infringement 
of his patent. 
Mr. Howard particularly defcribes the 
mode of obtaiping alkali from fal enixum, 
and the caput mortuums, of the fulphuric 
and muriatic acids; and his mode of fe- 
parating thofe acids from common-falt, 
brine, lie, &c. 
| Sere eer 
MR. ARNOLD WILDE aad MR. JOSEPH . 
RIDGE’S PATENT (LITTLE SHEF- 
FIELD) for manufaécturing of all kinDs , 
of SAWS, STEEL DOCTORS for PRIN - 
TERS, PLATES made of 1RON or 
STEEL,- BEADS 07, MOULDING of 
FENDERS, SPRINGS made of STEEL,. 
Ge. , 
When the fteel or iron articles are made 
or cut into the proper fhape, they are put : 
eS : into: 
489 poe 
MR. HOWARD'S PATENT (MANCHES- 
and POTASH, | 
from: 
bleachers wafte lie, rock-falt, foda, na>- 
Thefe ingre-:. 
