Vlll 



List of the Contributors. 



SMITHSONIAN INSTITUTION LIBRARIES 



3 9088 013551411 



Stoney, G. Johnstone, M.A., F.E.S. Page 



On the Penetration of Heat across Layers of Gas, (Abstract), . 51 

 On some remarkable instances of compassed Crookes's Layers or 

 Compressed Strata of Polarized Gas at ordinary atmospheric 

 tensions, . - . . . , . . . . , 53 



Wigham, John R., M.R.I.A. 



On a gas-light improver ; also on a new form of gas engine, used 

 with the Gramme Magneto-electric machine (verbal communi- 

 cation, . . . . . . . . . . . 132 



N.B. — Date of Publication of the several Parts of 

 Volume I., New Series. 



Part . 1, with pages 1 to 52, November, 1877, 

 „ 2, „ 53 to 132, May, 1878. 



„ 3, ,, 133 to end, November, 1878. 



