Vol.55. Philosophical Magazine. . ApiiiL.1820 



Contents of Number 264. 



Page. 



XXXVI. Answer to Mr. Brown on Professor Jame- 

 son's System of Mineralogy. By A Correspondent. 241 



XXXVII. Further Reply to Mr. Riddle on the Lunar 

 Observations, By Mr. Henry Meikle. - . - 342' 



XXXVIII. Catalogue of Antielit Eclipses, with the Dates 

 W of their corresponding Eclipses at one and two Periods Di- 



" stance. By Mr, Thomas Yeates. - . - . Si* 



XXXIX. On the Expansion and Contraction of Iron 

 Bridges by Ch:inges of Temperature ; with a Suggestion 



j for counteracting these Effects. By A Corresponpekt. 248 



XL, Description of an improved Hydro-pneumatic Ap- .„ 

 paratus. By Mr. John Cuthbert. - . - 249^1 



XLI. Facts respecting the increased Volatility and In- 

 flammability which Fish Oil and its Vapours acquire by 

 continued or renewed Exposure to certain high Tempera- 

 'tures; elicited by tlie Examination of Evidence in a lace 

 Trial in the Court of Common- Pleas, (Severn, King and 

 ; Co. versus Drew, or the Imperial Insurance OfEce), before 

 the Lord Chief Justice Dallas and a Special Jury. - 2521 



XLII. New Vegetable Alkalies. - - - 289'' 



XLIII. On tlie Sirane, a new Acoustic Instrument de-- 

 signed to measure the Vibrations of Air which constitute 

 Sound. By Baror) Cagniarb DE LA Tour. - - 298 



XLIV. Remarics to show that the Nature of the Atmo- 

 jC^ sphere contradicts the Notion that tlie Air explains the 

 f^rjv^ Phjenomena of the Sk-y. - . . - 



XLV. On the Alteration which Sulphuric Acid experi- 

 enc-es in acting upon Alcohol, 



XLVI. Anatomical Preparations. 



XLVII. Notices respecting New Books. : - - 



XLVIII. Proceedings of Learned Societies. 



XLIX. Intelligence and Miscellaneous Articles,— 



Conite Antiquities — Emerald Mines. — Discovery of Ci- 



'cero's T'.eatise de Hepublica. — The Interior of Africa.— 

 New Voyage of Discovery. — Ancient Navigation.— Earth- 

 I quake in Cork. — Shaking Minarets. — Indian Wild Ass.-^ 

 I Patents. —Astronomy. ~ Meteorological Tables. 306 — 



295 



295 

 298 

 300, 

 3061 



320, 



%* eommunicatlons for this Work, addressed to the Editor, ; 

 Pickett-Place, Tem|ile Bar, will meet with every attention. 



RICHARD AND ARTHUR TAT(LOR, PRIJiTERS, SHOE LANB, LONBaS. 



