1323.) 
metallic packing docs not exert a 
force by its compressure of more than 
two cwt.; consequently the friction 
amounts to only 20lbs. or one-three- 
hundredth part of the engine. Itis well 
known to practical engineers, that the 
friction of a piston newly packed with 
hemp, when too much compressed, is 
often sufficient to prevent the movement 
of the machine ; and, so long as the 
packing remains steam-tight, the fric- 
tion greatly diminishes the power of the 
engine; and that by wear in working 
the packing allows the steam to escape, 
thereby wasting fuel and tallow, and 
also impairing the power of the ma- 
chine: the loss is further increased by 
neglect of packing when required. 
_ LIST OF PATENTS FOR NEW INVENTIONS, 
Richard Pew, of Sherborne, esq. ; for a 
new composition for covering houses and 
other buildings.—June 17. j 
Charles Mac Intosh, of Crosshasket, 
Lanark, esq.; for a process and manu- 
facture whereby the texture of hemp, flax, 
wool, cotton, and silk, and also leather, 
paper, and other substances, may be ren- 
dered impervious to water and air.— 
June 17. 
James Smith, of Droitwich, civil en- 
gineer ; for an apparatus for the applying 
steam to the boiling and concentration of 
solutions in general, crystallising the mu- 
riate of soda from brines containing that 
salt, melting and refining of tallow and 
oils, boiling of sugar, distilling, and other 
similar purposes,—July 19. 
William Harwood Horrocks, of Port- 
wood, Chester, cotton-manufacturer ; for 
a certain new and improved method ap- 
plicable to preparing, cleaning, dressing, 
and beaming silk warps, and also appli- 
cable to beaming other warps.—July 24, 
1825. 
Richard Gill, of Barrowdown, Rutland, 
Fellmonger and Parchment-mannfacturer ; 
for a method of preparing, dressing, and 
dyeing, sheep-skins and lamb-skins with 
Literary and Critical Proémium. 
355 
the wool on, for rugs for carriages, rooms, 
and other purposes.—July 24. 
William Jeakes, of Great Russel-street, 
Bloomsbury; for an apparatus for regu- 
lating the supply of water in steam-boilers 
and other vessels, for containing water or 
other liquids.—July 24, 
William Davis, of Bourne, Gloucester- 
shire, engineer; for certain improvements 
m machinery for shearing and dressing 
woollen and other cloths requiring such 
process,—July 94. 
Henry Smart, of Berner’s-street, Mary- 
le-bone, Piano-forte-manufacturer; for cer- 
tain improvements in the construction of 
piano-fortes.—July 24. 
Miles Turner and Lawrence Angell, 
both of Whitehaven, soap-boilers ; for an 
improved process to be used in the bleach- 
ing of linen or cotton-yarn, or cloth.— 
July 24, 
John Jackson, of Nottingham, gun- 
maker; for certain improvements in the 
construction of the locks used for the dis- 
charge of gnns and other fire-arms, upon 
the detonating principle.—July 49. 
Joseph Bower, of Hunslet, Leeds, oil of 
vitriol manufacturer, and John Bland, of 
the same place, steam-cngine manufac- 
turer; for an improvement in such steam- 
engines as condense out of the cylinder, 
by which improvement or invention the 
air-pump is rendered unnecessary.—July31. 
John Bainbridge, of Bread-street, 
Cheapside, merchant ; for certain improves 
ments upon machines for cutting, crop- 
ping, or shearing, wool or fur from skins; 
also for cropping or shearing woollen, 
silk, cotton, or other cloths and velvets, 
or any other fabric or fabrics thereof re- 
spectively, whether made or composed 
entirely of wool, silk, cotton, or other 
materials of which cloth or velvet is made, 
or of any mixture or mixtures thereof 
respectively, and also for the purpose of 
shaving pelts or skins.—July 31. 
*.* Copies of the specifications, or further 
notices of any of these inventions, witl be 
inserted free of expense, on being transmitted 
to the Editor. 
NEW BOOKS PUBLISHED IN OCTOBER: 
WITH AN HISTORICAL AND CRITICAL PROEMIUM. 
—2— 
Authors or Publishers, desirous of seeing an early notice of their Works, are 
requested to transmit copies before the 18th of the Month. 
—a— 
NATURE DISPLAYED, by Dr. St- 
MEON SitAw, a writer familiar to the 
readers of the Monthly Magazine, has ‘ap- 
peared within the morfth, in six volumes. 
‘The capability which the snbjects afforded 
of splendid pape illustration, has been 
seized on, and the work is, in consequence, 
one of the most curious and interesting in 
the éiitire circle of literature. Perhaps it 
has no equal in any language. Many of 
the engravings,—as, the Falls of Niagara, 
the Terrestrial Mountains, the Eruptions 
of Vesuvius, the Strata of the Earth, and 
some of the Microscopic subjects,—are 
half-sheets, and the whole are nearly 300 
in number, representing at least 1500 sub- 
jects. The exotic trees, shrubs, and 
much of the natural history, are coloured 
after 
