1825.1 
water in the boiler, by constantly drawing 
out a quantity of the super-saturated brine, 
and introdueing other water to supply its 
place, as well as of that whichhas evaporated, 
by which means the water in the boiler can 
neve®- exceed a certain degree of saturation. 
The machine recommended to be used to 
effect this, is a small pump with a loaded 
discharge valve, worked by the engine, 
and ‘so proportioned, as to draw, from the 
lowest part of| the boiler, the quantity re- 
quired ; and, whether it be worked quickly 
or slowly, the quantity withdrawn bears the 
same proportion to the quantity left in; 
and, however long the engine may be 
worked, the saltness of the water can never 
be increased. Thus, the evils to which, in 
this respect, steam vessels have hitherto 
been subject on long voyages, being obliged: 
to stop and refill the boilers every. fifty or 
sixty hours, or incur the risk of injury, to 
the boilers, are avoided, and also. great 
waste of fuel, during the latter part of the 
time. Another part of the invention arrests 
the heat contained in the rejected water, 
and returns it to the boilers. This is effect- 
ed by running the hot brine into a vessel, 
and passing the supply-water through a 
system of pipes immersed in the vessel, 
containing the hot brine, and surrounded 
by it in the same way as refrigerators are 
made to act upon worts; thus compensat- 
ing, in a great degree, for the loss of heat 
which would otherwise be sustained by 
removing a portion of the hot, and intro- 
ducing cold water. 
To T. Macratu, of Dublin, for his new 
invented and improved Apparatus for 
conducting and containing Water and 
other Fluids, and preserving the same 
From the effects of Frost.—11th January 
* 11825. 
The improvement herein proposed, con- 
sists in coating the pipes or other vessels 
employed with pulverized charcoal or some 
such imperfect conductor of heat; when 
the water, being surrounded and excluded 
from the action of the atmosphere; its 
ealoric cannot be abstracted, because of the 
non-conducting properties of the coating ; 
it is therefore prevented from freezing, and. 
is preserved in its fluid state, however low 
the thermometer may stand in the open air. 
The apparatus is simply a double pipe, and 
the spaces between the pipes filled with non- 
conducting materials. In a similar way, 
water tanks or cisterns may be con- 
structed; their sides, top and bottom, 
being doubled, and pulverized charcoal, 
or some such material, introduced between 
the two. f 
A List or rar Parenrs which, having been 
_ granted in December 1811, will exrran in 
the present: Month of December, viz. 
» Dec. 4,—-To I, A.Winnson, of Shooter’s- 
Mowrury: Maa. No. 417. 
Lists of Expiring and New Patents. 
44] 
hill, Kent: for employing sugar as an in- 
gredient in gunpowder and other combustibles. 
—See our 34th vol, p.428. 4 
9.—To J. Hupson, of Cheapside, Lon- 
don: for a new composition, wherewith to 
print paper-hangings, or to paint walls or 
ceilings. —See our 33d vol., p. 335. 
16.—To J. Exvey, of Canterbury, Kent: 
for an improved winnowing machine. 
19. To J.Sonsy, junior, of Sheffield, 
Yorkshire: for a method of making shears 
Sor sheep or horses, and for glovers? use. 
A List ov New Parents, granted in 
September and October 1825. 
Sept. 29.—To W. Duesbury, of Bosel, 
Derby: fer a mode of preparing a white 
From the impure native sulphate of barytes.— 
Six months. 
Oct. 6.—To J. Martineau, the younger, 
of the City-road, and H. W. Smirn, of 
Laurence Pountney-lane : for improvements 
in the manufacture of steel—Six months. 
6.—To Sm G. Caytey, Bart., of Bromp- 
ton, York : for a new locomotive apparatus. 
—Two months. 
6.—To J. S. Broapwoop, of Great Pul- 
teney-street, Golden-square: for improve- 
ments in square pianofortes.—Six months. 
13._To T. Howarn, of New Broad- 
street: for a vapour-engine.—Six months, 
13.—To N. Kimgatt, Falcon-square : 
for a process for converting tron into sleel.— 
—Six months. 
13.—To B. Sanvers, of Broomsgrove, 
Worcester: for improvements in making 
buttons.—Six mouths, 
13.—To T. Dwyer, of Lower Ridge- 
street, Dublin: for improvements in making 
buttons. —Six months. 
13.—To J. Crzsirn Danirt, of Stoke, 
Wilts : for improvements in machinery ap- 
plicable to the weaving of woollen cloth.—Six 
months, 
_ 13.—To J. Easton, of Heal-cottage, 
Bradford, Somerset: for improvements in 
locomotive or steam-carriages, and in the con- 
struction of roads fer them.—Six months. 
21.—To W. Hinsr, J. Woon, and J. 
Rocrrson, all of Leeds: for improvements 
in machinery for raising and dressing cloth.— 
Six months. ; : 
21.—To R. S. Perumsrrtron, and J. 
Moreay, of Llanelly, Carmarthen: for a 
consolidated. or combined drawing and forcing 
pump.—Two months. 
21.—To G, Gurney, of Argyle-street, 
Hanover-square: for improvements im the 
apparatus for raising or generating steam.— 
Six months. 
21.—To L. W. Wnhicut, of Princes- 
street, Lambeth: for an improvement in 
The. construction of  steam-engines, — Six 
months. : Wess 
22. To H. C. Jenninas, of Devonshire- 
street, Portland-place : for improvements in 
the process of refining sugar.—Six months. 
Si MONTHLY 
