CONTENTS. Til 



Page 



Fulminating Powders 39.5 



New Method of destroying Calculi 3f)6 



White's Floati ng Breakwater 397 



Marobia 397 



New Scientific Books 3 9 8 



New Patents 3 9 8 



Mr. Howard's Meteorological Journal 399 



NUMBER VI.-DECEMBER. 



Biographical Sketch of the late Rev. E. D. Clarke, LL.D 40 1 



Col. Beaufoy's Astronomical Observations 4l9 



Mr. Herapath on the Solution of V a = x {concluded) 420 



M. Gay-Lussac on Conductors of Lightning. (With a Plate.) 427 



Mr. Daniell' s Reply to X 439 



M. Levy on a new Mineral Substance 43 9 



Mr. Moyle on the rapid Descent of the Barometer in October 442 



Mr. Harvey's Observations on Naval Architecture 443 



Mr. Moyle on the Temperature of Mines 446 



M. Berzelius on Fluoric Acid (continued) 45 ° 



Dr. Fitton's Additional Remarks 



Letter from Mr. Webster 



Mr. Whipple's Reply to Mr. Phillips 4 ^ s 



Proceedings of the Royal Society 



_ Linnean Society 464 



. Geological Society 465 



Minerals produced by Heat * ' 



Berzelius's Analysis of the Sulphato-tricarbonate of Lead 407 



Localities of Scottish Minerals • • • 468 



On the Pyro-electricity of Minerals • • • 4 °9 



Height of Mount Etna 4 ? 2 



472 

 Mediterranean ' 



New Patents 472 



Mr. Howard's Meteorological Journal 473 



Index , = ... 475 



