Xvi CONTENTS, 



Page 



Mr. Jamks N. Shoolbred on Tides in the Irisli Sea 2-50 



Mr. W. Smith on A. S. Hallidie's Wire Rope Traction-Railway 252 



on a Means of Recording the Movements of Points and Signals 252 



on a Breech-loading Mountain Gun 252 



on a Military Bidon 252 



Mr. F. C. Stileman on Portishead Dock 252 



Messrs. Stroudley and Rusbridge on Communication between Passengers 



and Guards 252 



Mr. John I. Thornycroft on Vertical Motion of Vessels 252 



Sir W. Thomson on a Machine for the Calculation of Tides 253 



and Mr. J. Hopkinson on Methods of giving Distinctive 



Characters to Lighthouses 253 



Mr. W. ToPLEY on the Channel Tunnel 253 



Mr. Beauchamp Tower on a Machine for obtaining Motive Power from the 

 Motion of a Ship among Waves 253 



on a Revolution-Indicator 254 



Dr. Joseph Woolley on Steering 255 



APPENDIX. 



Prof. W. F. Barrett on the Effect of Heat in altering the Moleculai- Structure 

 of Steel 259 



Mr. N. LowENTiiAL Lonsdale on Mechanical Self-Registering Apparatus 

 for Barometer, Thermometei", Rain- and Wind-Gauges 260 



ERUATUM IN EEPOET FOR 1874. 



In the REroiiTs. 



Pago 24'], line 16 from bottom, for Mr. Charles Law rp«(7 Mr. ChuunoU Law. 



