VI CONTENTS. 



Page 



NUMBER CXL— NOVEMBER. 



The Rev. W. Whewell on the mean Level of the Sea 321 



Mr. Gulliver's Observations on certain Peculiarities of form in 



the Blood Corpuscles of the Mammiferous Animals 325 



Dr. T. Scheerer and Mr. W. Francis on some Combinations 



of Arsenic with Cobalt 331 



Mr. W. Francis's Examination of a crystallized Nickel Ore . . 335 

 Mr. Lubbock on the Variation of the Semi-axis Major of the 



Moon's Orbit. . . . 338 



Dr. J. Davy's Observations on the aqueous Solution of Car- 

 bonate of Magnesia with excess of Carbonic Acid, and on 

 the Salt which it affords by spontaneous Decomposition. ... 346 

 An Abstract of Professor Daniell's Papers on the Electrolysis 

 of Secondary Compounds, in the Philosophical Transactions 



for 1839 and 1840 349 



Dr. Faraday on Magneto-electric Induction ; in a Letter to 



M. Gay-Lussac (concluded) 356 



Prof. Dove on the Law of Storms 366 



Mr. W. G. Armstrong on the Electricity of a Jet of Steam 



issuing from a Boiler : in a Letter to Prof. Faraday 370 



Mr. H. L. Pattinson's Experiments on the Electricity of High- 

 Pressure Steam 375 



Prof. Sylvester's Note on Elimination 379 



Proceedings of the Royal Society 380 



the Geological Society. 387 



Note referred to in the Abstract of Professor Daniell's Paper, 



p. 354 396 



New Compound of Platina 397 



Blue Oxide of Titanium in Scoria? 398 



On the Protein of the Crystalline Humour 398 



Meteorological Observations for September, 1840 399 



Table 400 



NUMBER CXIL— DECEMBER. 



Dr. T. Thomson on the Minerals found in the Neighbourhood 

 of Glasgow , 401 



Deductions from the first Year's Observations at the Magnetic 

 Observatory at Prague ; in a Letter from Professor Kreil to 

 Major E. Sabine 418 



Mr. J. Tovey on Mr. Potter's Application of Huyghens's Prin- 

 ciple in Physical Optics 431 



