CONTENTS. 

 VOL. IV. 



1837. 



Description of a new Barometer, recentlj' fixed up in the Apartments 

 of the Royal Society ; with remarks on the mode hitherto pursued 

 at various periods, and an account of that which is now adopted, 

 for correcting the observed height of the mercury in the Society's 

 Barometers. By Francis Baily, Esq., Vice-President and Trea- 

 surer, R.S page 1 



Magnetical Observations made in the West Indies, on the Coasts of 



Brazil and North America, in the years 1834, 1835, 1836 and 1837. 

 By Sir James Everard Home, Bart., Commander Royal Navy, F. R.S. , 

 the Observations reduced by the Rev. George Fisher, M.A. F.R.S.. 4 



On low Fogs and stationary Clouds. By WiUiam Kelly, M.D 33 



On the Colours of Mixed Plates. By Sir David Brewster, K.G.H. 

 F.R.S. &c '. 33 



Of such Ellipsoids, consisting of homogeneous Matter, as are capable 

 of having the Resultant of the Attraction of the Mass upon a Par- 

 ticle in the Surface, and a Centrifugal Force caused by a revolving 

 about one of the Axes, made perpendicular to the Surface. By 

 James Ivory, K.H. M.A. F.R.S. L. and Ed. Inst. Reg. Sec. Paris, 

 Corresp. et Reg. Sc. Gotting. Corresp 34 



1838. 



Experimental Researches in Electricity. — Eleventh Series. By Michael 

 Faraday, Esq. D.C.L. F.R.S. FuUerian Professor of Chemistry at 

 the Royal Institution, &c 37 



On the Variation of a Triple Integral. By Richard Abbott, Esq. 

 F.R.A.S 42 



Explanation of the Phsenomena of Intermitting Springs. By W. L. 

 Wharton, Esq. , 42 



Fourth Letter on Voltaic Combinations, with reference to the mutual 



A 2 



