CONTENTS. y 



Page 



Mr.W. S. MacLeay's Notice on the Larvae ofDiptsra 178 



Dr. Walchner's Reply to Mr. W. Phillips's Remarks on the 



Crystalline Form of the Hyalosiderite 179 



Mr. W. Phillips on the Crystalline Forms of the Natural and 



Artificial Sulphuret of Bismuth 181 



Dr. Spurgin's Outlines of a Philosophical Inquiry into the Na- 

 ture and Properties of the Blood ; being the Substance of 

 three Lectures on that Subject delivered at the Gresham 

 Institution during Michaelmas Term 1826 {continued).... 183 

 Mr. Robberds's Reply to Mr. R. C. Taylor's Remarks on his 



Hypothesis on the former Level of the German Ocean .... 192 

 Mr.Gray's Description of a new Genus and some new Species 

 of Saurian Reptiles; with a Revision of the Species of Cha- 

 meleons 207 



Proceedings of the Royal Society 215 



Geological Society 217 



Astronomical Society '_ 22 



Ammonia in Native Oxide of Iron 229 



Detection of Hydrocyanic Acid — Transference of Heat by 



Change of Capacity in Gas 230 



Analysis of Spathose Iron — Salt obtained from Opium — Arse- 

 nic and Cadmium — Quantity of Charcoal obtained from dif- 

 ferent Kinds of Wood 231 



Water of the Dead Sea — New Acid in Stavesacre 232 



Dr. Hare's Method of detecting minute Quantities of Opium, 

 in Solution — Dr. Hare's Easy Mode of obtaining Meconic 

 Acid — Dr. Hare's Method of preparing denarcotized Lau- 

 danum 233 



Mr. Lonsdale on the Occurrence of Galena in the Inferior 



Oolite 234 



CEconomy of Teredo Navalis, &c 235 



New Patents 237 



Meteorological Observations 238 



by Mr. Howard near London, 



Mr. Giddy at Penzance, Dr. Burney at Gosport, and Mr. 

 Veall at Boston 240 



NUMBER X.— OCTOBER. 

 Mr. Ivory on the Figure of Equilibrium of a Homogeneous 

 Planet in a Fluid State ; in reply to the Observations of 



M. Poisson {continued) 241 



Dr. Spurgin's Outlines of a Philosophical Inquiry into the Na- 

 ture and Pro|)erties of the Blood; being the Substance of 

 three Lectures on that Subject delivered at the Gresham 



In.stitution during Michaelmas Term 1826 247 



Mr. De la Beche's Collections in Foreign Geology — [No. IV.] 253 



Mr. Moseley on Caustics 263 



Mr. Robberds's Reply to Mr. R. C. Taylor's Remarks on his 

 Hypothesis on the former Level of the German Ocean 



{continued) 271 



Mr. 



