XVI CONTENTS. 



Page 

 Mr. William Gorman on a Momentum Engine 206 



on a Pressure Water-Meter 207 



Mr. Andrew Henderson on the Measurement of Ships 207 



Mr. M. HoLDEN on Working a Steam-engine with Rarefied Air 207 



Mr. Robert Jamieson on a Compass independent of Local Attraction 207 



Mr. James Laing on a new Air-Pump 207 



Professor Macdonald on the Structure of Shell Mortars without Touch-hole, 



to be discharged by Galvanic Circuit 207 



Mr. Herbert Mackworth on the Metra > 207 



Mr. Robert Mair on au Application of Galvanic Power to Machinery 208 



Dr. March on a Screw-vent for tuming Spiked Guns into use 208 



Mr. George Mills on Manoeuvring Steamers 208 



Mr. J. R. Napier's Description of the Laimch of the Steamer 'Persia' 208 



• on a simple Boat Plug 208 



■ on a new Method of Drying Timber 208 



Mr. W. J. Macquorn Rankine on Practical Tables of the Latent Heat of 

 Vapours 208 



on the Operation of the Patent Laws 208 



Mr. G. Rennie on the Effects of Screw Propellers when moved at different 

 Velocities and Depths 209 



Mr William Sim on the Blasting and Quan-ying of Rocks 209 



Professor C. Piazzi Smyth on the Transmission of Time Signals 209 



Dr. Taylor's Account of Experiments on Combustion in Furnaces, with a view 

 to the Prevention of Smoke 209 



Mr. James Thomson on the Friction Break Dynamometer 209 



on a Centrifugal Pump and Windmill erected for Drain- 

 age and Irrigation in Jamaica 210 



■ on an India-rubber Valve for Drainage of Low Lands 



into Tidal Outfalls 210 



on Practical Details of the Measurement of Rimning 



Water by Weir Boards 210 



Mr. J. F. Ure on the Navigation of the Clyde 211 



Mr. W. J. Macquorn Rankine's Concluding Address 211 



APPENDIX. 



Mr. J. W. Salter on some Additions to the Geology of the Arctic Regions... 211 



ERRATUM. 

 Page 87, line 6, /or a dextral and not a sinistral, read a sinistral and not a dextral. 



