1809.] Monthly Retrospect 
fing-boxes is entirely obviated, there 
being only one which is covered with 
water, consequently no air can enter the 
engine, bat what is already contained in 
the water used for injection. There is 
not any thing to be seen moving be- 
longing to these engines, but the centre 
shaft revolving; they do not make the 
least noise, take up very little room, and 
only about half the price of beain- 
engines. I find, im practice, that they 
answer ali the ends intended. 
ED 
MR. THOMAS COBB’Ss (BANBURY,) for 
Inprovements in Making Paper in 
separale Sheels. 
In the several figures attached to this 
specification, we have representations of 
the vats, agitators, and other parts of 
the machinery used for faciltaung the 
operations of couching and pressing: 
Kkewise of two rollers, upon which an 
endless web of felt is made to circulate 
ina certain direction: also of a table, or 
platform, faced with felt, and placed in 
contact with the circulating web, which 
serves to support "the pressure of the 
face of the mould, which a workman ap- 
plies to the circulating web, 1n the act 
of couching ; during which act, the web 
_ remains motionless, by being thrown out 
of the gear. Having described all the. 
machinery, the patentee adds: ‘ And 
farther, for the ordinary purposes of 
paper-manufacturers, and more espe- 
cially for the purpose of manufacturng 
paper by the machinery herem before 
described, I do make the deckle, or run 
of my mould, of a different construction 
froin those at present used ; and do Jike- 
wise cousiderably alter the external 
framing of my mould; that is to say, = 
stead of the usual thick frame of wood, 
in which the cross-bars of the mould are 
tcnanted, and on which the covering of 
wire is nailed, J make the frame equally 
thick at the bottom part, to receive the 
———————— 
afi Pare cdris 219 
hand of the coucher, and ends of the 
cross-bars, and bring them quite to aa 
edge on the upper part, so as to allow 
the water to pass off; and instead of 
jailing the wire at top, Eturu it down 
the side, and fasten it there; and cover, 
the whole outside: of the frame of the 
mould with thin metal, oa which T place - 
another square frame of wood, or metal, 
which slides up and down, and forms 
the deckle, which by pressure, or re- 
action from the bearing parts of the - 
agitable frame, is made to stand a litthe 
above the face, when the sat mould is 
placed in the situation to receive its 
charge, and is suffered to shide back for 
want of the like pressure, or re-acuiOhy 
when the mould arrives at the web of 
the couching machinery; and morecver, 
the series of the moulds thus constructed 
and fitted up, do apply more closely to- 
each other when placed upon the agis_ 
table frame; and do thereby prevent @ 
considerable waste of stuf, which .would 
otherwise ensue. And, lastly, the fixed 
frame-work, for supporting my said 
machinery, and the naanner of connect- 
ing the several parts together, so that 
_their motions may be properly adapted 
to the purposes herein before specised , 
and described; in order to show the 
nature. of my’said Invention, and the: 
means by which the sameis to be carried 
into effect, together with the methods of 
driving the said machinery, by any of the 
powers usually employed to give motion 
to machines; and also the several ma- 
terials to be used, in constructing the 
same, may be made, used, adapted, and 
applied in different manners, according 
to the choice or judgment of the maker; 
and any workman of competent skill, ia 
the construction: of mill-work, or. the 
like machinery, will find no. diticalty im 
forming, making, and completing the 
same, from the general instructions here 
givens 
MONTHLY RETROSPECT oF THE ELNEVWARTS. 
The Use of all New Prints, and Communication of Articles of Tnseliigence, §¢. are res 
3 ae 2 ? 
quested under coven to the Cure of the Publisher. 
Se 
View of the East Front of the New Theatre 
~ Royal, Covent- Garden. Drawn andengraved 
by William Deniel, Associate of the Rayal 
’ Academy of Arts. Lonaon, published by Wil- 
liam Daniel, 9, Cleveland-street, Fitzroy- 
square, and by Messrs. Longman and Co. Pa- 
ternoster-rowW. 
ss ae architectural part of the theatre 
of which this print is a graphic ye- 
presentation,) has been noticed in the 
two preceding numbers of this Magazine. 
Tt is a perspective view looking north 
ward, and is correctly drawn, both in the 
architectural and the sculptural details. 
The aquatinta is soft and well managed 3 
and is altogether a faithful representation 
of this grand edifice. 
Poriraits 
