CONTENTS OF N" k%—New Series. 



LIII. Chemical Examination of a Crystalline Substance from the 

 Zinc-foundry at Filisur; together with an Account of some ancient 

 Glass Beads coloured by Oxide of Copper. By the Rev, Wm. V. 

 Vernon,F.R.S page 4.QI 



LIV. On the Detection of Baryta or Strontia when in union with 

 Lime. By Mr. J. Andrews 



LV. On a simple Method of exhibiting the Combustion of the 

 Diamond. By Mr. W. Herapath 407 



LVI Letter from Mr. E, Galloway respecting the new Paddle- 

 Wheel,' the Invention of which is claimed by Mr. King Williams: 

 with Affidavits relating to that Subject 40b 



LVII Determination of the Dimensions of the Earth, from the 

 principal Measurements of Arcs of Meridians. By Dr. Edward ^^ 

 Schmidt ' 



LVIII. On the Figure of the Earth. By James Ivory, Esq. M. A. 

 F.R.S.&c 



LIX. On the Census. By J. W. Lubbock, Esq. F.R.S. &c. . . . 4^16 



LX On the Origin of the Improvements which have been made 

 in the Performance of Steam-Engines in Cornwall within the last 

 seventeen Years. By Mr. Farey *^i, 



LXI On the Duty of Steam-Engines in Cornwall. By John 

 Taylor, Esq. F.R.S. &c *24 



LXII On the Dying Struggle of the Dichotomous System. By 

 W. S. MacLeay, Esq. M.A. In a Letter to N. A. Vigors, Esq. • 

 F.R.S. {^To be continued.) ^•Sl , 



LXIII Observations on the Comet in Pegasus, April and May 

 1830 made at Geneva by Mr. Wartmann; and its Elements calcu- 

 lated' by C. RuMKER, Esq. M. Astr. Soc *46 



LXIV. Letters from the President and Secretary of the Royal 

 Society, in refutation of an alleged Inaccuracy in the Minutes of the 

 Council 446 



LXV Proceedings of Learned Societies :— Royal Society; Geo- 

 logical Society; Linnaean Society; Astronomical Society.. 449-459 



LXVI Intelligence and Miscellaneous Articles:— Specific Heat 

 of Elastic Fluids ; Experiments on Gold, by Dr. Thomson ; Supposed 

 new Vegeto- Alkali— Chinioidia; Chemical Action of Light; Dr. 

 Webster's Dictionary; List of New Patents; Aurora Borealis; 

 On the Difference in the Height of Spring Tides; Observations 

 on the Planet Venus in the Day-time; Meteorological Observa- 

 tions for April 1830, and Table; Index 460-472 



« • 



It is requested that all Communications for this Work may be addressed, 

 post paid, to the Care of Mr. R. Taylor, Printing Office, Red- Lion-Court, 

 Fleet-Street, London j where complete Sets of the Old Series of the Phi- 

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