CONTENTS OF VOL. III. 



(FIFTH SERIES). 



NUMBER XV.— JANUARY 1877. 



Page 

 Dr. K. Heumann's Contributions to the Theory of Luminous 



Flames 1 



Mr. W. Spottiswoode on a Large Induction-coil 30 



Mr. A. Cayley on the Number of the Univalent Eadicals 



C n H 2 «+i 34 



Prof. Wohler on the Action of the Flame of Alcohol upon 



the Metal Palladium 35 



Prof. J. Emerson-Revnolds's Reports from the Chemical Labo- 

 ratory of Trinity College, Dublin. No. 1. — On Glucinum : 



its Atomic "Weight and Specific Heat 38 



Lord Rayleigh on a permanent Deflection of the G-alvanome- 

 ter-needle under the influence of a rapid series of equal and 



opposite induced Currents . . . . 43 



Captain Abney on the Alkaline Development of"tae Photo- 

 graphic Image 46 



Mr. F. Field on Ludlamite, a new Cornish Mineral 52 



Notices respecting New Books : — 



Prof. M. E. Mascart's Traite d'lllectricite Statique 58 



Mr. B. T. Bosanquet's Treatise on the Trisection of an 



Angle of thirty degrees, and of any other plane Angle. 61 

 The Rev. G. T. Carruthers's Earth supported by Vapour. 62 

 Proceedings of the Royal Society : — 



Prof. T. Andrews on the Gaseous State of Matter .... 63 

 Mr. R. J. Moss on the Condensation of Vapour of Mer- 

 cury on Selenium in the Sprengel Vacuum 67 



Sir John Conroy on the Absorption-Spectra of Iodine . . 68 

 Proceedings of the Geological Society : — 



Mr. H. Hicks on the Pre-Cambrian (or Dimetian) Rocks 



of St. David's 73 



Prof. S. Calderon on the Fossil Vertebrates of Spain . . 73 

 Messrs. W. Topley and G. A. Lebour on the Intrusive 



Character of the Whin Sill of Northumberland 74 



On the Portative Force of Horse-shoe Magnets, by V.-S.-M. 



van der Willigen 75 



Experiments on the Sympathetic Resonance of Tuning-forks, 

 by Robert Spice 78 



