= ‘ 
F y ; yeast <a * Dk a j SAP pos ON 
’ R. STEWART has the honour to annownce to the Philosophical 
UVa World, that aitout the Middle of December he will submitfor 
SALE by AUCTION, at his Great Room, 194, Piccadilly, All the - 
~ Waluable and well-known ExectricaL, PurLosopuicau and CHEMicaAL 
Apparatus ofthatEminent Experimental Philosopher the late GEORGE 
JOHN SINGER, Esq. consisting of Magnificent Plate and Cylinder © 
Machines of the largest Dimensions, constructed upon very superior — ~ 
“Principles. Electric Columns, among which are some very interesting 
Specimens of Electrical Perpetual Motions, with all the usual Apparatus — i 
‘used in scientific Lectures. To which will be added his Select Library OFS 
‘Books, chiefy upon Chemistry and Experimental Philosophy. i: 
Catalogues are preparing, and further Particulars will be announced in 
_ due time. is Se ee ay . 
4% 
.‘Phis Day is published ia Octavo, with numerous ‘Tables and Plates, 
tag ‘Price 18s. in Boards, | Pike tie Cake 
N ESSAY on the STRENGTH and STRESS of TIMBER, 
- founded upon Experiments performed at the Royal Military Aca- — 
_ demy, on Specimens selected from the Royal Arsenal, and His Majesty’s © 
“Dock Yard, Woolwich,- preceded by an historical, Review of former _ 
’’ ‘Theories and Experiments ; also an Appendix on the Strength of Tron 
~ and other Materials... ‘ 
By PETER BARLOW, 
: Of the Royal Military Academy, Sa a ee 
"Published by J. Taylor, at the Architectural Library, 59, High Hol+ JF 
i DORN. taurts Reine eteAe ) hy TOT RADE 
t 
ENGRAVINGS, . . We ea: 
Vol. XLUL. A Plate containing Professor Lesx12’s Atmometer, and: ‘ 
' Rigures to illustrate Dr. Wouraston’s Paper on the elementary Particles © 
of certain: Crystals.—A Sketch of that Part of the Island of Java which | | 
contains the natural Lake of Sulphuric Acid.—Interior of Volcano in the | 
Island of Java, and Figures to illustrate Mr. Warker’s’ Paper on the Elec. 
tric Fluid —A Plate to illustrate M. Livx’s Memoir on the Anatomy of © 
Plants, and Dr. Wottastron’s Cryophorus.—A third Plate’ to illustrat ae 
MM. binx’s Memojr on the Anatomy of Plants—Mr, T. Jongs’s Seeto- / 
graph,—a new Instrument for dividing right Lines into equal Parts,measur- 
ing Angles, and inscribing Polygons in the Circle, &e. fia oh eee 
~ Vol. XLII. A Plate to illustrate a New Transit Instrument invented © 
by Sir H, C. Exeverrerp, Bart.—A Plate to illustrate the Use of Aire 
Vessels in Plants: By Mrs, Issrrsonn—A Pilate to illustrate M. Sz- 
MENTINY’S New Apparatus for, producing Oxygen Gas to restore sus- 
pénded. Animation—-Mr. ReApe’s Paper on the Refraction of the Solar & 
Rays—-and: Mr. Harcreaves’s Observations on Colours.—A Plate to} 
illustrate Mr. J. Wuirrorn’s mechanical’/Substitute for Leeches; and Mr. 
» Jo'Tinuny'’s, Hydro-pn¢gdn-atie Blov -pipe. —A Plate to describe. Mr. | 
R. Hucues’s Gudgcon for the Shaftof 2 Water-wheel ; and Mr, Pap- 
~ aUay’s Guard for a Carriage-wheel.—A Plate to describe Captain Peat’s 
‘Temporary Ship’s Rudders—A Quarto Plate of Mr, Samuen J 
Sofa Bed. at phic PU ee A at: Roi ao 
“Vol. KLIV, A Plate to illustrate Mr. Hume's Gazometer and Blows 
pipe; a Proposal for an Improvement of the Galvanic Trough; and 
‘ new Apparatus for preparing pure Muriatic Acid —A_ practical Diagr. 
for obtaining the Lunaz Distances observed by a Sextant 
Apparatus to illustrate Mr. Branpz’s Paper on some new Elec 
Pienomena.---A Quarto Plate to illustrate Mrs. Innewrson’s Paper on thé 
’ Cuticle of Leaves.—Brunton’s Patent Chain Cable,—Il'ig ures relative ¢ 
“Di. Baewstye’s Paper-on the Affections.of ‘Light transmitted throug 
ed Bodiesi<-A Plate to illustrate Dr. Brewsrer’s Paper 
