﻿CONTENTS of N° 272.— Fourth Series. 



XXIV. Calorimetric Researches. By R. Bunsen. (With a 

 Plate.) page 161 



XXV. On some recent Investigations relative to Lunar Activity. 



By W. R. Birt, F.R.A.S. (With Two Plates.) 183 



XXVI. On the Influence of Density and Temperature on the Spectra 



of Incandescent Gases. By F. Zollner 190 



XXVII. To determine the degree of Polarization in the case of a 

 ray of common Light falling obliquely on and being reflected or re- 

 fracted by a bundle of parallel Plates. By W. G. Adams, Professor 



of Natural Philosophy in King's College 205 



XXVIII. Investigations on the Electrophorus. By W. von Bezold. 214 



XXIX. On the Corona seen in Total Eclipses of the Sun. By Pro- 

 fessor W. A. Norton 225 



XXX. Notices respecting New Books : — Principles of Mechanism, 

 designed for the use of Students in the Universities, and for Engi- 

 neering Students generally. By Robert Willis, M.A., F.R.S., 

 Jacksonian Professor of Natural and Experimental Philosophy in the 

 University of Cambridge, &c. Second Edition. — A Laboratory Text- 

 book of Practical Chemistry ; or, Introduction to Qualitative Analysis. 

 A Guide to the Course of Practical Instruction given in the Labora- 

 tories of the Royal College of Chemistry. With ninety engravings. 



By Wm. G. Valentin, F.C.S 236-239 



XXXI. Proceedings of Learned Societies : — 



Royal Society : — The Hon. J. W. Strutt on the Theory of 

 Resonance 239 



XXXII. Intelligence and Miscellaneous Articles : — 



On some Analogous Principles of Photometry, and the Law of 



Attraction, by W. von Bezold 241 



A Solar Fog-bow, by R. C. Carrington 244 



On the Refractive Phenomena of an Alcoholic Solution of Fuchsin, 

 by M. C. Christiansen 244 



*** It is requested that all Communications for this Work may be addressed, 

 post-paid, to the Care of Messrs. Taylor and Francis, Printing Office, Red 

 Lion Court. Fleet Street, London. 



