CONTENTS. 

 VOL. XXXIX. 



No. 239. 



Page 



On the Atomic Weight of Glucinum (Beryllium). Second Paper. By T. 

 S. Humpidge, Ph.D., B.Sc., Professor of Chemistry in the University 

 College of Wales, Aberystwith 1 



On Certain Definite Integrals. No. 13. By W. H. L. Eussell, A.B., 

 F.E.S 20 



On Certain Definite Integrals. No. 14. By W. H. L. Eussell, A.B., 

 F.E.S 22 



The Yortex Ring Theory of Gases. On the Law of the Distribution of 

 Energy among the Molecules. By J. J. Thomson, M. A , F.E.S., 

 Fellow of Trinity College, Cavendish Prof essor of Experimental Physics 

 in the University of Cambridge 23 



The History of the Kew Observatory. By Eobert Henry Scott, M.A., 

 F.E.S., Secretary to the Meteorological Council 37 



On the Microscopic Characters of some Specimens of Devitrified Glass ; 

 with Notes on certain analogous Structures in Eocks. By Douglas 

 Herman and Frank Eutley 87 



The Bakerian Lecture — On the Corona of the Sun. Bv William 

 Huggins, D.C.L., LL.D., F.E.S. 108 



Eesults of the Harmonic Analvsis of Tidal Observations. By A. W. 

 Baird, Major E.E., and G. H. Darwin, F.E.S., Fellow of Trinity College 

 and Plum inn Professor in the Universitv of Cambridge 135 



No. 240.— November 19, 1885. 



On the Total Solar Eclipse of September 9, 1885 (in a Letter to Professor 

 Stokes, Sec. E.S.). By James Hector, M.D., F.E.S., Director of the 

 Geological Survey, New Zealand 208 



On the Total Solar Eclipse of September 9, 1885 (in a Letter to J. N. 

 Lockyer, F.E.S.). By A. S. Atkinson 211 



