viii CONlliNTS. 



NUMBER XCIL— SUPPLEMENT, 



Page 



Mr. Henwood on the Expansive Action of Steam in some of 

 the Pumping Engines on the Cornish Mines 481 



Proceedings of the Royal Society, Geological Society, Astro- 

 nomical Society, Cambridge Philosophical Society, and 

 American Philosophical Society 492 — 542 



Committee of Commerce and Agriculture of tlie Royal Asiatic 

 Society of Great Britain and Ireland 542 



Separation of Ethyle (Ethule, Ethereum, = 4 C + 5 H,) by 

 C. Lowig 543 



Separation of Phosphorus from its Oxide, by M. Bottger .... 544 



Index ' 545 



PLATES. 



I., II., III. Three coloured Lithographs, illustrative of Mr. Talbot's 

 Paper on Analytic Crystals. 



IV. A Map, illustrative of Major Sabine's Paper on Magnetic Lines of 



no dip and of least intensity. 



V. A Chart, illustrative of the Rev. J. Grooby's Paper on the Passage of 



the Moon across the Pleiades on the 18th of March, and in 

 August, September, and November 1839. 



ERRATA. 



Page 51, line 9 from bottom, for Muswell read Muswell Hill. 



Page 73, line 25, for disilicate read bisiHcate. 



Page 151, last line,/o>- Herculis read Hercules. 



Page 169, line next above the equation (12.) for b' read b. 



Page 171, second line of (18.) for A3 read A'3. 



Page 174, line 10,/or correctly rearf approximately. 



Erratum in Vol. xiii. 

 Page 469, line 5 from the bottom,/or paralysed read polarized. 



