CONTENTS of N° 278.— Fourth Series. 



XI. On the Reflection of Light from Transparent Matter. By The 

 Hon. J. W. Strutt, M.A., Fellow of Trinity College, Cambridge, page 8 



XII. On Mr. Hopkins's Method of determining the Thickness of 

 the Earth's Crust. By Archdeacon Pratt, M.A., F.R.S 9* 



XIII. On a Practical Method for detecting bad Insulators on Te- 

 legraph Lines. By Louis Schwendler, Esq 102 



XIV. Investigation of the Law of the Progress of Accuracy, in the 

 usual process for forming a Plane Surface. By George Biddell 

 Airy, Astronomer Royal 10 



XV. On Statical and Dynamical Ideas in Chemistry. — Part III. 

 The Atomic Theory. By Edmund J. Mills, D.Sc 11' 



XVI. On the Constitution of Milk and Blood. By M. Dumas . . 12 



XVII. On the Mechanical Impossibility of the Descent of Glaciers 

 by their Weight only. By Henry Moseley, D.C.L., F.R.S., Canon 

 of Bristol, &c 138 



XVIII. Proceedings of Learned Societies : — 

 Royal Society : — Mr. C. W. Siemens on the Increase of Elec- 

 trical Resistance in Conductors with rise of Temperature, and 

 its application to the Measure of Ordinary and Furnace Tem- 

 peratures ; also on a simple Method of measuring Electrical 

 Resistances ; M. Berthelot on the Change of Pressure and 

 Volume produced by Chemical Combination 150-155 



Geological, Society : — Lieut. -Col. Drayson on the Probable 

 Cause, Date, and Duration of the Glacial Epoch of Geology; 

 Mr. W. D. Herman on Allophane and an Allied Mineral 

 found at Northampton; Mr. J. C. Hawkshaw on the Peat 

 and underlying Beds observed in the construction of the Albert 

 Dock, Hull 155-151 



XIX. Intelligence and Miscellaneous Articles : — 

 On the Ipfluence of a covering of Snow on Climate, by A. 



Wojeikof, Member of the Imperial Russian Geographical 



Society 156 



On Electro : telegraphy, by R. S. Culley, Esq 159 



On the Eruption Theory of the Corona, by W. Mattieu Williams. 160 



%* 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, Londow, 



