xix 



On Fibre. Additional Observations. By Martin Barry, M.D. F.R.S. 

 Lond. and Ed jpage 384 



Barometrical Observations, showing the effect of the Direction of the 

 Wind on the Difference between distant Barometers. By Lieut. - 

 Colonel Philip Yorke, S. F. Guards 386 



On the Rectification and Quadrature of the Spherical Ellipse. By 

 James Booth, Esq, M.A. Principal of Bristol College 387 



On the Transparency of the Atmosphere, and the Law of Extinction 

 of the Solar Rays in passing through it. By James D. Forbes, Esq. 

 F.R.S. &c 389 



On the Specific Inductive Capacities of certain Electric Substances. 

 By William Snow Harris, Esq. F.R.S 392 



On the Action of the Rays of the Solar Spectrum on Vegetable Colours. 

 By Sir John Frederick William Herschel, Bart. K.H. F.R.S 393 



Experimental Researches on the Elliptic Polarization of Light. By 

 the Rev. Baden Powell, M.A. F.R.S. Savilian Professor of Geometry 

 in the University of Oxford 394 



On the Influence of the Moon on the Atmospheric Pressure, as deduced 

 from the Observations of the Barometer made at the Magnetic Ob- 

 servatory at St. Helena. By Lieut. J. H. Lefroy, R.A. late Director 

 of that Observatory 395 



Notices of the Aurora Australis from the 1st to the 31st of March 



1841, made on board H.M.S. Erebus ; extracted from the log-book. 



By Capt. James Clark Ross, R.N. F.R.S 395 



An Appendix to a paper on the Nervous Ganglia of the Uterus, with 

 a further Account of Nervous Structures of that Organ. By Robert 

 Lee, M.D. F.R.S 395 



Magnetic-term Observations of the Declination, Inclination and Total 

 Intensity, made at the Magnetic Observatory at Prague, for Fe- 

 bruary, March, and April 1842. By C. Kreil, Director of the Prague 

 Observaton'^ 396 



Magnetic and Meteorological Observations for February 1842, taken at 

 the Magnetic Observatory at Madras. Presented by the Honour- 

 able Court of Directors of the East India Company 396 



Magnetic and Meteorological Observations from May 1841 to March 



1842, made at the Observatory established by the Rajah of Travan- 

 core, at Trevandrura, transmitted to the Royal Society by command 

 of His Highness the Rajah. By John Caldecott, Esq. F.R.S. Di- 

 rector of the Observatory at Trevandrum 396 



Postscript to a paper ' On the Action of the Rays of the Solar Spec- 

 trum on Vegetable Colours.' By Sir John Frederick William Her- 

 schel Bart. F.R.S. &c 397 



Observations de la vaiiation de la declinaison et intensite horizontale 

 magnetiques observees a Milan pendant vingt-quatre heures con- 

 secutives, le 22 et 23 Juin, le 20 et 21 Juillet, le 26 et 27 d'Aout, le 

 21 et 22 Septembre, et le 19 et 20 Octobre, 1842, rapportees par 

 Robert Strambrecchi, premier eleve adjoint 398 



On certain improvements on Photographic Processes described in a 



