CONTENTS OF N-^ Q.—New Series. 



XXX. On the Figure of Equilibrium of a Homogeneous Planet in 

 a Fluid State ; in reply to the Observations of M. Poisson, published 



in this Journal for July last. By J. Ivory, Esq, M. A. F.R.S. page 161 



XXXI. Collections in Foreign Geology.— [No. III.] By H. T. De 



LA Beche, Esq. F.R., L. and G.S. &c. &c. ( To be continued) 168 



XXXII. Reply to Mr. Henderson's Remarks on Captain Sabine's 

 Pendulum Observations. By Capt. E. Sabine, R.A. F.R.S. &c. ... 176 



XXXIII. Notice on the Larvae of Dz/j^era. By William Sharp 

 MacLeay, Esq., F.L.S , 178 



XXXIV. Reply to Mr. W. Phillips's Remarks on the Crystalline 

 Form of the Hyalosiderite. By Dr. Walchner, Professor of Che- 

 mistry, Carlsruhe 179 



XXXV. On the Crystalline Forms of the Natural and Artificial 

 Sulphuret of Bismuth. By William Phillips, F.L.S. F.G.S. &c. 181 



XXXVI. Outlines of a Philosophical Inquiry into the Nature and 

 Properties of the Blood ; being the Substance of three Lectures on 

 that Subject delivered at the Gresham Institution during Michaelmas 

 Term 1826. By John Spukgin, M.D. Fellow of the Royal College 

 of Physicians of London, and of the Cambridge Philosophical So- 

 ciety ( To be continued) 183 



XXXVII. Reply to Mr. R. C. Taylor's Remarks on the Hypothesis 

 of Mr. Robberds on the former Level of the German Ocean. By 



J. W. Robberds, Esq. Jun 192 



XXXVIII. A Description of a new Genus and some new Species 

 of Saurian Reptiles; with a Revision of the Species of Chameleons. 



By J. E. Gray, F.G.S. &c 207 



XXXIX. Proceedings of Learned Societies : Royal Society ; 

 Geological Society ; Astronomical Society 215 — 229 



XL. Intelligence and Miscellaneous Articles : — Ammonia in 

 Native Oxide of Iron ; Detection of Hydrocyanic Acid ; Trans- 

 ference of Heat by Change of Capacity in Gas ; Analysis of Spa- 

 those Iron ; Salt obtained from Opium ; Arsenic and Cadmium ; 

 Quantity of Charcoal obtained from difibrent Kinds of Wood ; Water 

 of the Dead Sea; New Acid in Stavesacre ; Method of detecting 

 Minute Quantities of Opium, in Solution, by R. Hare, M.D. ; 

 Easy Mode of obtaining Meconic Acid, by R. Hare, M.D. ; Method 

 of preparing denarcotized Laudanum, by 11. Hare, M.D. ; On the 

 Occurrence of Galena in the Inferior Oolite, by Mr. W.Lonsdale; 

 Economy of Teredo navalis, &c. ; New Patents ; Meteorological 

 Observations, Table, &c 229 — 240 



(,* It is re(jucstcd that all Communication!! for this Work may be addressed, 

 post paid, to the Care of Mr. R. Taylor, Printer, ReJLion-Court, Fleet- 

 Street, London. 



