Be, = ’ 
Contents or Numerr 259. 
y _X¥XvIIL Onthe Question « Whether Music is necessary i 
iy to the Orator,—= to what Extent, and how most readily vat~ 
*tainable?? By Henry Urincron, ksq. 
XXXIX. Observations on three British Species of War- 
8 blers;-with a view to’a’more accurate Discrimination of » 
them, and the consequent Elucidation of eee of Na- |. . 
tural History. | By T. Forster, M.B.P.L.S.: a 260) 
! XL. -Disceveries made in Egypt by Mr, Gian swith 6 ' 
% Remarks on the probable Reason for the principal Entrances |. 
Sev into the Pyramids having been constructed ee Wes inan, » B 
ASK ean of 26° or 27°: to the Horizon. = o's, SBS. NS 
ALY. On Calorific Radiation. By Mr. Sites Meigis. 260° gts 
XLII. On the Purification ef Coal Gas; on the ammo-(" . - 
niacal Liquor of Coal Gas; and.on some singular Products | 
abtained front the ammoniacal. tase Dy Mr. Grorcs | 
Lows, of Derby, = 
4}. KALIL. Formula for calculating the Force of Steam. 
By My. W. Crricurox, + 
at XXLIV. On Aphlogistic Phicnomena ‘and the ; Magnetism 
se Of Violet Light. By Mr. J. Murray, =... 26: 
© «© XLY.. Method of ascertataing Distances fron one Station | - 
3 to another (in, Levelling or, Surveying) on Level and, va- 
Rally riously in: clined Surfaces, to theit exact ength of Hower 
tal Dase, by the Addition of an angular Bubble attached t to 
ti! We, the ‘Telescope of a Spirit Level. + HY Mr. cee Hanns, 
e wer of Walworth’ 
XLVI. On the Recpitation of Oxygen Cn in an Aff: 
ation of the Thorax. By Professor Sirtrman.  - - 
wag KX LVII. Description of the American Tar and Water - 
S Burner invented by Mr. Samuat Morey, of the United 
tee. States. - - 
XLVI. A ‘Letter to ee JaMusox, by Mr. Joun . 
Farry Sen... - os - - 
XLIX. On Wheel-Cariges, and the Incapacity of most 
“A Roads to sustain the Wear of very heavy Loads. ~By Mr, - 
SS Jouw Farey Sens Mineral Su: aac and E Engineer. 
L.. Noticas respecting New Kooks, - - 
DI. Proceedings of Learned Societies. - 
my Toba. Tnteliience and Misccllaneans Atticles + Process 
& for unrolling the Hesculanean Manuscripts by Sir Gv mpary 
Davy. —Pyromucous Acid.-Native Cop per..—Triphane.-= 
Aimianthus—Pate gnts—— Metcorolog Fy &e. - - $03—820 
eer A! 
Ho Coramunicat itns for this) Werk, nditesaed to the Editor, 
Pi ck ettE | Lace,” ‘pemple Bar, will mect with Vida) attention. 
at Bat ex 
Esaagy 3 ‘ike 
ay WES eo 
RICHARD AXD ARTNUR TAYLOR, PRIN asa | SHON LANB,' LONDON, © 
NG s be My ly 
