CONTENTS. XV 



MECHANICAL SCIENCE. 



Page 

 Address by John Hawkshaw, F.R.S., F.G.S., President of the Section .... 18.3 



Mr. Peter W. Barlow on the Power i-equired to overcome the Vis Inertice 

 of Railway Trains, with a Description of a Machine to propel Trains between 

 ' Stations at frequent Intervals without Locomotives 184 



Admiral Sir E. Belcheb on Improvements in the Defence of Ships of War. . 185 



Mr. EDW.A.RD Chahlesworth on the New Elevator Gim 185 



Mr. Zerah Colbuhn on Steam Boilers 185 



Captain Doty on the Torpedoes used by the Confederate States in the Destruc- 

 tion of some of the Federal Ships of War, and the Mode of attaching them 

 to the Rams. (Communicated by Admiral Sir E. Belcher.) 185 



Mr. G. Fawcus on Suggested Improvements in Doors 186 



on Improvements in Scaling- and other Ladders 186 



Mr. George Bell Galloway on Improvements in Screw Propellers 186 



on Lifeboats for Ships and Steamers 186 



Mr. George Glover on Instruments for the Measurement of Gas 186 



Mr. G. Hartmann's Description of a Parallel Gauge 186 



Captain A. Henbebson on the Practical Progress of Naval Architecture in 

 Ocean and River Steamers, vdth Suggestions for Improvements in the Steer- 

 age of the Great Eastern and large and small Ironclads, Rams, and Gunboats, 

 similar to the Assam Nautilus, by the use of Balanced Rudders in Bow and 

 Stem 186 



Mr. R. A. Peacock on Chain-cable and Anchor Testing 187 



Mr. T. Symes Prideaux on the Constniction of Shot-proof Targets 187 



Professor W. J. Macquorn Ranking on some of the Strains of Ships 187 



on Units of Measure 188 



Captain Selwyn on Submarine Telegraphy 188 



Mr. J. L. Stothert and Mr. Robert Pitt on a Machine for Testing Girders 189 



Mr. H.C. SoRBYonMicroscopicalPhotographsofvarious Kinds of Iron andSteel 189 



Mr. Symons on the Working of Undergi-ound Railways by Hydraulic Power 189 



Mr. James Williams's Experiments on the Elasticity of Iron 190 



Captain Wheatley on Plated Ships and their Armament 190 



on Revolving Sails 190 



on Improvements in the Defence of Ships of War 190 



List of Papers of which Abstracts have not been received 191 



