CONTENTS. XV 



Page 



Dr. Leone Levi, Statistical Data in Relation to the Representation of the 

 People 162 



MECHANICAL SCIENCE. 



Address by Sir W. .Armstrong, K.C.B., F.R.S., President of the Section . . 164 



Sir W. G. Armstrong on Chain-testing Machines . . . v 165 



Mr. Henry Bessemer on the Manufacture of Cast Steel, its Progress, and 

 Employment as a Substitute for Wrought Iron 165 



Mr. F. I. Bramwell on Weldless Tyres, Circular Rolling, and Railway 

 Wheels 173 



General Sir J. F. Burgoyne on Railways in War 173 



Mr. G. Burt on a Pneumatic Hammer 175 



Mr. D. K. Clark on Torbite (a new Preparation of Peat) and its Uses 175 



Mr. J. M. Clements on a Machine for stitching Button-holes 176 



Mi\ E. A. Cowper on a new Cotton Gin for separating Cotton Fibre from the 

 Seed 176 



on the Effect of Blowing Blast Furnaces with Blast of very 



High Temperatures 177 



Mr. S. N. F. Cox on Siemens's Regenerative Gas-Fumaces and Producers . . 177 



Mr. William Fairbatrn on some of the Causes of the Failure of Deep-sea 

 Cables, and Experimental Researches on the Permanency of their Insulators 178 



Mi\ George Fawcus's Suggestions for Improvements in Blocks for Lowering 

 Ships' Boats, and for Improvements in Boats 184 



Mr. Nath. J. Holmes on District Private Telegraphs 184 



Mr. W. Hooper on the Applicability of India-rubber as an Insulator for Tele- 

 graphic Conductors 184 



Mr. T. Levick on Machinery for Compressing Air, and the Applicability of 

 such Compressed Air for working Coal-cutting and other Underground 

 Machinery 185 



Mr. J. Robinson on some Developments of and Improvements in Giffard's 

 Injector. 186 



Mr. C. W. Siemens on the Outer Covering of Deep-sea Cables 187 



Mr. W. Sissons's description of a Patent Steam Pile-Driver 190 



Mr. B. Smith on Wanning, Lighting, and Ventilating the Birmingham Town 

 Hall 190 



List of Papers of which Abstracts have not been received 191 



