CONTENTS. vii 



M. Gay-Lussac on Kermes Mineral 3''gg 



Berzelius on Thorina and Thorinum ggg 



Preparation of Magnesium— New Native Compound of Car- 

 bonate of Lime and Carbonate of Soda 389 



Circulated by the Astronomical Society : Lunar Occiiita'tions 

 of some of the principal fixed Stars, for the months of May 

 and June 1830. Computed, for the meridian and parallel of 



Greenwich, by Lieut. W. S. Stratford 39O 



Dr. Burney's Results of a Meteorological Journal for the Year 

 1829, kept at the Observatory of the Royal Academy, Gos- 



port, Hants og. 



New Patents | ' gg« 



Meteorological Observations 398 



401 



404 



NUMBER XLII.— JUNE. 



Rev. W. V. Vernon's 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 ■^ 



Mr. J. Andrews on the Detection ofBaryta'or Stron'tia when 

 m union with Lime 



Mr. W. Herapath on a simple Method of 'exhibiting the Com- 

 bustion of the Diamond .^^ 



Mr E. Galloway's Letter respecting the'new Paddie-Wheel" 

 u aT','*'°" of which is claimed by Mr. King Williams ' 

 with Affidavits relating to that Subject . 408 



Dr E. Schmidt's Determination of the Dimensions of the Earth 

 from the principal Measurements of Arcs of Meridians ' 409 



Mr. J. Ivory on the Figure of the Earth 4^% 



Mr. J. W. Lubbock on the Census . 4,,^ 



Mr. Farey on the Origin of the Improvementswhich have been 

 made in the Performance of Steam- Engines in Cornwall 

 within the last seventeen Years 491 



Mr. J.hn Taylor on the Duty of Steam^Enginesin Cornwall '. 424 



Mr VV S. MacLeay on the Dying Struggle Sf the Dichotomou 

 System, in a Letter to N. A. Vigors, Esq 40, 



Observations on the Comet in Pegasus, April and Mav'lSSO 

 made at Geneva by Mr. Wortmann ; and its Elements caU 

 culated by C. Rumker, Esq. 



Letters from the President and Secretaryof 'the' Royal' So- 

 oS CoIincii'''"°" ''^''" ^"^^"' Inaccuracy in the Minutes 



Proceedings of the Royal Society .' .' .' ,' .' .' ' .' .' ,' ,' ." ." ." .■.■.■;■■■ 449 



Geological Society 452 



— Linnacan Society 459 



Astronomical Society . '. 459 



Specific 



