Vol. 60. Philosophical Magazine. Oct. 1822. 



CoNTENT-s or Numb£r 294. 



XLIV. On tlie proposed Alteration of Weights and Mea- 

 sures, and the Adaptation of Gauging Apparatus thereto. By 



Wm. Guttexidge, Esq, ...^ Page 241 



XLV. On an Ijnprovemeijt in the Apparatus for procuring 

 Potassium. By William Mandell, B.D. Fellow of Queen's 



College, Cambridge 247 



XL VI. On the Origin and Discovery of IrOn. "By David 



MosHKT, Esq. .. ; , ; 249 



XLVII. On the Application of Magnetism as a Measute of 

 Electricity. By the Rev. J. Gumming, M.A. F.R.S. M.G.S. Pro- 

 fessor of Chemistry in the University of Cambridge 253 



XLVIIL Report of a Committee of the House of Commons 



on Steam-Boats. Ccontinued.J 257 



XLIX. On the Repeating Circle improved according to the 

 Suggestion of Baron Zach : and on taking Observations of the 

 Pole Star. By Prof. Littbow, of the Imp. Observatory Vienna. 263 

 L. Analysis of Air taken from an Ice-House. By John Mur- 



BAY, F.L.S. M.G.S. M.W.S. &c. &c 266 



LI. A Defence of the New Theory of the Tides. By Captain 



FOBMAN 267 



LII. On reducing theLunar Distance. ByHENBvMEiKLE.Esq. 271 

 LIII. On some new Tables of Aberration and Nutation. 



By Francis Baily, Esq. F.R,S 279 



LIV. D's Second Reply to C, on Mr. Hebapath's Theory 285 

 LV. On a New Sextant recently invented and constructed 



by Professor Amici, with a Plate 301 



LVf . Observations on the occasional Appearance of Water 



in the Cavities of regular Crystals ; and on the porous Nature of 



Quartz and other Crystalline Substances, as the probable Cause 



df that Occurrence. Bv John Deuchar, M.Rj^.I. Edin. &c. &c. 310 



LV^II. On a new cii-culai- Micrometer : communicated in a 



Letter from M. Littrow to F. Baily, Esq 314 



LVIII. On Pyroligneous jEther. By Philip Taylor 315 



LIX. On a Lunar Iris, by Dr. W. Burney 317 



Note on Mr. Murray's Paper on the Relation of Acids. and 



Alkalies to Vegetable Colours i 319 



LX. Notices respecting New Books.— Analysis of Periodical 



Works on Natural History. 319 



LXI. Intelligence and Miscellaneous Articles : — Law of Ca- 

 loric stated by M. Laplace. — Distribution of Temperature in 

 Metals by Mechanical Concussion. — Observations of the.present 

 Comet, by Professor Harding of Gottingen. — Adipocire of 

 Corpses. — Return of the North-west Land Expedition. — Taylor 

 and Martineau's new Lithographic Printing Press. — Nautical Al- 

 manac for 1825. — Obituary : Dr, A. Mai-cet, Mr. J. Sowerby, 

 Marquis Canova.— List of Patents.— Meteorological Table. 321-328 



♦** Communications for this Work, received by the Editors, 

 38, Shoe-Lane, will meet with every attention. 



UICHAllD r.-VVLOH, FHINTIiK, SHOE-LANE, LONDON. 



