—-3799-] 
' 
wpon the pifton anfwerable to its velocity. 
1 Mr. Luccock has ingericufly con- 
trived a walve-box, which ferves the cy- 
linder both as a bafis and a bottom; he 
has alfo applied a /afety-pipe to prevent 
the accidents which wonld refult from the 
imperfect movements of the valves ; and 
the valves themfelves he opens and thuts by 
means of a plug-beam and tumbler. 
Having given motion toa pifton, and by 
that means to a working lever, as in the 
fteam-engine, he propofes to convey the 
‘motion thence to machinery, or the like, 
either by means of the common crank, or 
any other of the methods now in ufe, or by 
a new and improved crank, of which he 
gives a copious defcription. The im- 
‘provement confifts in refolving the power 
of the working end of the great beam, | 
when it is in motion, into two or more 
parts, and in caufing each to operate in a 
direction at right angles to each other, or 
at an angle approaching to a right one. 
"The power of the engine may be refolved 
into two or more parts, and their united 
effort employed upon the circumference of 
a circle, by a variety of other methods ; 
in eachof which, however, he makes ule of 
two or more f{pears, one of them aéting at 
fome angle to the other, which muft be 
Jarger or fmaller, as circumftances render 
referable ; but, in general, the nearer the 
bescs of their aétion approach to a right 
angle, the better. This improvement he 
intends to apply, not only to the para- 
doxical machine, but alfo to the fteam- 
engine, and to. any other cafe where it is 
neceflary to produce a revolving motion 
from an alternate one. 
The paradoxical machine may be ap- 
Lift of Difeafes in London, 
565 
plied to various purpofes, particularly to 
drive machinery Hiatt kind; to raife 
water for canals, where a fupply of it is 
wanted ; and fo any other purpofe what- 
ever which requires power of this kind ; 
excepting in the cafe where an engine fimi- 
lar to that which is defcribed in Fig. ry 
is placed wholly and entirely in a coal-pit, 
coal-mine or coal-work, or in the fhaft or 
paflage to fuch pit, mine, or work ; the 
injection-pipe of the faid engine alfo rif- 
ing from the cylinder in a plane perpen- 
dicular to the plane of the horizon, or in 
a plane declining not more than twenty- 
five degrees from that perpendicular ; the 
faid engine alfo not being furnifhed witha 
fafety-pipe; and provided likewife that 
the engine, fo fituated, be ufed folely for 
the purpofe of raifing water, or coals, or 
both, in the faid pit, mine, or work, in 
which fuch engine is placed. 
They may be conftruéted of iron, or 
any other metal or fubftance which can 
endure the chemical a€tion-of the fluid 
which works the engine, and the preflure 
occafioned by its weight. The refpective 
parts alfo may be made of different mate- 
rials; as for inftance, the ciftern may be 
made of wood ; the pipes, of tin or lead ; 
the cylinder, of iron; the valves, of brafs, 
&c. or they may vary in other refpects, 
as fhall be deemed convenient. - Allo, the 
magnitude of thefe engines muft be 
adapted to the fituation in which they are 
placed, and the work they have to do. 
The proportion alfo of the different. parts 
which compofe them may vary at plea- 
fure. -It.it neceflary that all the parts of 
the machine be. properly fupported, and 
fixed in their feveral fituations. 
 *y* We earneftly requeft that Patentces will not omit to favour us with the ufe of 
a Copy of their fpecifications., Mr. Brewin’s, and fome others are deferred for wvant 

OF DISEASES IN LONDON. 
From the 20th of Fune, to the 20th of Fuly. 
of room. 
LIST 
ACUTE DISEASES. 
No. of Cafes. 
YPHUS - - - 3 
Quotidian . ~ - I 
Meatfles -. - - - 3 
Scarlatina - - - - 2 
‘Acute Rheumatifm - ~ 3 
- CHRONIC DISEASES. 
Cough - = - 4 
Dyfpnea - - ~ 5 
Cough and Dyfpnea - - 6 
Afthma - - - 2 
Phthifis Pulmonalis - ~ 5 
Pleurodyne ~ - - 2 
~ Hzemoptoe - - z 
Monvury Mag. Noe. xzvin 
‘Hemiplegia i S4 
Hydrothorax - - 
Afcites 
Cephalalgia = = 
Apoplexy 2 - 
~~ - -_ 
“a 
Vers! Va) Fal 
Epilepfy - - 
Vertigo - - 
Epiitaxis - 
Dyfpepfia - 
Vomitus - - 
Gattrodynia - 
Enterodynia - 
Amenorrhea = 
Menorrhagia difficilis 
Chiorofis - 
42 
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