CONTENTS. V 



Page 

 Mr. Ivory on the Ellipticity of the Earth as deduced from Ex- 

 periments with the Pendulum 165 



Mr. Giddy on the Climate of Penzance, Cornwall — Meteoro- 

 logical Results of the Temperature, Wind and Weather de- 

 duced from diurnal Observations made at Penzance for 21 

 Years ; (the Thermometrical Observations made at 8 a.m. 

 and 2 p.m.) to which are added the Maxima, Minima, and 

 Media of the Register Thermometer for 7 Years, with the 



Inches of Rain fallen during that Period 173 



Mr. Haworth's Description of New Succulent Plants . . . 183 



On the supposed Subsidence of the German Ocean 188 



Mr. Nixon on the Measurement by Trigonometry of the Heights 

 of the principal Hills in the Vicinity of Dent, Hawes, and 



Sedbergh, in Yorkshire 189 



Dr. Roget on an Apparent Violation of the Law of Continuity. 203 

 Mr. Ivory's Additional Discussion respecting the Ellipticity of 

 the Earth as determined by Experiments made with the Pen- 

 dulum 206 



Mr. Herapath's Failure of Lagrange's Method of integrating 



Linear with Constant Coefficients 210 



Mr. Bicheno on Systems and Methods in Natural History 



{continued) 1 213 



New Books : — Tredgold on the Steam-Engine — Young's Ele- 

 ments of Geometry, with Notes 21 9 — 222 



Proceedings of the Linnaean Society 223 



Geological Society 225 



Astronomical Society ^27 



— at the Friday Evening Meetings of the Royal In- 

 stitution of Great Britain 229 



Analysis of some Alloys of Bismuth 230 



Examination of Copper — On Efflorescence 231 



Native Platina— Manufacture of Ultramarine 232 



Heat given out during Combustion — Inflammable Gas arising 

 after boring for Salt— Inflammable Gas from Salt Mines em- 

 ployed for producing Light — Natural Gas Lights at Fredonea 233 

 Iodine in Cadmium — Analysis of the Green Iron Ore and 

 Arseniate of Lead — Mr. Robotham's Geometrical Problem — 



Scientific Books 234 



New Patents — Meteorological Summary for the Year 1827 . . 236 



Meteorological Observations 237 



■ by Mr*. Giddy at Penzance, Dr. 



Burney at Gosport, and Mr. Veall at Boston 240 



NUMBER XVI.— APRIL. 



Mr. Ivory's Letter to the Editors relating to the Ellipticity of 

 the Earth as deduced from Experiments with the Pendulum 241 



Mr. J. Phillips's Remarks on the Geology of the North Side of 



the Vale of Pickering 243 



Mr. 



