The Sun.
London, England, 1806-03-10 00:00:00

GREGORY's MECHANICS,

In Two large Otlavo Volumes, besides a Volume containing
Fifty-five Quarto Plates.
This Day was published, price il. 16s. in boards,

TREAIISE of MECUANICS, Theoretizal,
Pradical, aod Descriptive.
By OLINTHUS GREGORY,
Of the Royal Military Academy, Woolwich.

•-.-
Vol. I. Book r. Op Statics, comprising the Composition
and Resolution of Force, the Centre of Gravity, and the Cen-
trdbaryc Method, Mechanical Powers, Strength and Stress of
Materials, and the Theory of Cords,\Arches, and Domes.
Book a. Dynamics, in which. are treated Motions, De-
scents and Ascents along difficrent Lines and Cuives, Pro..
jectiles; Ricochet-firing,-.Pendulums, Central-forces, Cen-
tres of Oscillation, Spontaneous Rotation, &c. Don moan's
Theory of Percussion, and the motion of, Machines and their
maxthum elfeets: •. .

BOOk 3. Hydrostatics, including the pressure of non-,
elastic. Fluids, the specific Gravity of solid and fluid Bodies,
with an extensive Table, the Equilibrium, Stability, and Os-
cillations of floating Bodies, and capillary Attraction.
.Book .. Hydrodynamics, treating of the discharge of Fluids
through Apertures,and of the motions of Water-wheels, With
accounts of important experiments on those interesting
topics.
.Book-. S. Pneumatics, including the equilibrium and- mo-
tion of Air, and other elastic Fluids ; the measurement of
Altitudes by the Barometer -and Thermometer; the Theory
of -kir and 0: Water. pumps, and the resistance of Fluids.
Vol. 11. Contains -Remarks on the Nature, onstruCtion,
and Silllplifit:ation.of Machinery,on Friction and the Rigidity
of COrdS, FirstAltivers,Scc. with Tables, and Descriptions of
nearly two hundred curious and useful Machines; of which,
however, only a few can be specified in an Advertisement.
Atwood's ingenious-Apparatus for variable Motions,,
Improved Beam Compasses,. by Walton.
Prony's Condenser of Forces, applicable to Wind-mills.
Cranes, by Gottlieb, Andrews,' Hall, Whyte, Hardie, .Sec.
Hydraulic Engines, i. the Tympanum, the
,NGria, De
La Faye's Wheel, the Persian Wheel, Chain-pumps ; Hero's
Fountain, Darwin's Engine, Hungarian Machine, the Spiral
• Pump, Desaguliers's Drawer and liuCket, Sarjeant's Machine,
Dearborn's Engine, &c.

Oil-mills and Ordnance Boring7q)achines.
Contriiiinces for Parallel Motions, by Cartwright, Dry_
den, &c.
Various Pumps, with Remarks on Pistons and-Valves. •
Ramsden's Alas line fur Dividing Mathematical Instru-
ments. _ _ _ . . _ _

Contrivances for reversing and changing Motions.
Scapements, by Graham, Mudge, De Lafons, &c:
Stearn Engines, by Newcomen, Blakey,. Gaii:sborptigh,
Watt, Flornbiower, Cartwright, Murray, Bettancourt,
Woolf, 4c. .
Bramati's Machine for planing different' kinds of Surfaces.

Rules for forming Teith and Wipers, with Maudsley's
Teeth-cuttrug.Apparatus.
Ho, izontal, vertical, and circurar Saw_mias,
s.ihjecl :fever before treated in any English
work), with contrivances bv. Gosset, Lloyd, and Dryden.
Turning Apparatus, by Maudaley and Smart.
Whter.inil:3, Under-shot, over-shot, spirals floating, &c.
Wind-mills, vertical, horizontal, &c. by Perrier, Beatson,
Bywater, and...others.
Printed th- Kearsley, Fleet-street, London: where may
likewise be had, this Author's Treatise on Astronomy, price
15s boards and his LC.540:15. Astrom. and Philos. pme 4s)
boards. .

.To SHIP and BOAT-BUILDERS, &c.
TO BE SOLD BY. AUCTION, • •
13y Messrs. HOG,GAIIT and
,PHILLIPS,
Successors to Mr: Smith, by-order of the Commissioners aa-
ing under a Commission of-Bankruat a.;aiust Tho. White,
of Broadstairs,•Ship- builder, at Gairaway's, on Friday the
28th instant, at Twelve o'clock,
• AN Old-established, Compa&, and Comthodious
SHLP and BOAT-BUILDER's YARD, most de,
sirably situateat Braadstairs, adjoining the Harbour, in the
Isle of Thanet, with an excellent Freehold Dwelling house,
in good repair, commanding a chnplete view of thc Premises,
Work-shops and TenemCnts,.recently erected at. considerable
expence. 'these Premises have been,used for
er's Yard for more than half a century, aware well worthy
the attention of the Trade. All the valuable Stock of' Ship-
timber-will be sold by audion on the Premises, in lots, in a
Ecru days after the sale of the Estate. -
May be viewid and Particulars had on the Premises; of Mr.
Daniel, Solicitor, Ramsgate ; of Mess. Dennets anti GreaveS,
Solicitors,.King's Arms Yard, .Coleman-street ; at Garra-
way's ; and of Messrs. Hoggart and Phillips, 6z, Broad-
street, near the Royal Exchange, where a Plan of the Estate
may be seen.

CAPITAL BUILDING MATERIALS-RETFORD,
NOTTINGHAMSHIRE.
TO BE SOLD BY AUCTION,
By Messrs. HOGGART and PHILLIPS,

Successors to Mr. Smith, on the Premises, some time in
May, in Lots, unless an acceptable offer is made for the
whole by Private Contra a on or bcfore the 200 A Aril,

HE Valuable BUILDING MATERIALS
(nearly new) of the RE VOLUTION MI LL, with
convenient Wool and Sorting Rooms, Dye. house, Drying-
houSes, Store-rooms, Stabling and Work-shops of every de-
scription, a capital Steam Engine of great power, by Boul-
ton and Watt, and an Engine for extinguishing fire, with
every sort of Machinery for drawing„' roving, spinning, and
other operatiqns. upon Wool, and several of Carrwrlght's
Patent Machines for combing Wool.
• The Premises are remarkably well situated adjoining the
Cainshorough Canal, supplying the Works with Coal at a
,cheap rate, and close to the Great North Road, in the Parish
of Clarborough, with 19 Dwelling-houses and to Acres of
rich Land adjoining. Immediate possession may be had. -
To be viewed, and Particulars had ten (lays previous to the
Ssle, at the Saracen's Head, Newark ; Black's Head, Not-
tingham; Angel, Doncaster ; White Hart, Wakefield ; Ho-
tel, Exeter ; White Hart, Rettord; on the Premises ; of
Wessrs. tones and Green, Solicitors,Salisbury-square,
.Fleet-
street ; of Mr. Walton, Whitesmith, Rettord, who will
slew the Premises ; -and of Mesirs. Hoggart and Phillips,
-62, Broad street, near the Royal E i,chanve. ,