VI CONTENTS. 



Page 

 Mr. R. E. Alison's Narrative of an Excursion to the Summit of 

 the Peak of Teneriffe on the 23rd and 24th of February 1829 



{continued) 248 



Mr. G. Dakin's proposed Improvements in the Construction of 

 the Cylinder Electrical Machine and accompanying Appa- 

 ratus 251 



Mr. S. Sharpe on the Solid of greatest Attraction 256 



Mr. J. G. Children's Abstract of the Characters of Ochsenhei- 

 mer's Genera of the Lepidoptera of Europe ; with a List of 

 the Species of each Genus, and Reference to one or more of 



their respective Icones (continued) 259 



Additions to the Theory of Eclipses, and the Methods of cal- 

 culating their Results (continued) 268 



New Books : — Dr. Christison's Treatise on Poisons ; — Da- 

 venport's Supplement to " The Amateur's Perspective ;" — 

 Lieut. Col. Thompson's First Book of Euclid'sElements 276 — 289 

 Proceedings of the Astronomical Society — Geographical So- 

 ciety of London , 290 



Brown's Microscopical Observations on the Particles of Bodies 



— Vegetable Milk of the Hya-Hya tree of Demerara 296 



Precipitate of Chloride of Iodine by Sulphuric Acid — Butyric 

 Acid in Urine — Existence of Lactic Acid — Fuming Nitric 



Acid 297 



Preparation of Sugar from Starch — Sulphate of Potash and 

 Copper— Action of Sulphuric Acid upon Zinc, and Causes 



producing Electricity 298 



Atmospheric Carbonic Acid 301 



Arseniurets of Hydrogen 302 



Preparation of Bicarbonate of Soda — Analysis of Mustard- 

 seed, by M. Pelouze — On Salicine, by MM. Pelouze and 



Jules Gay-Lussac 303 



Sulphate of Barytes forming a Vein in Cannel Coal 304 



Law of Patent Inventions 305 



Circulated by the Astronomical Society : Principal Lunar Oc- 

 cupations of the Planets and fixed Stars in October 1830. 

 Computed for Greenwich by T. Henderson, Esq. — Aurora 



Borealis . . . 316 



New Patents 317 



Meteorological Observations 318 



NUMBER XL VII.- NOVEMBER. 



Mr. H.K. Cankrien on the Problems of the Calculus of Varia- 

 tions 321 



Rev. B. Powell's Remarks on a Passage in Dr. Thomson's 

 " Outline of the Sciences of Heat and Electricity." London, 



1830 329 



Mr. 



