CONTENTS. Xix 



Page 



2. On recent Advances in Electric Lighting. Bv James N. Shoolbred, 



B.A., Mem. Inst. O.E 503 



3. On the Changes of Volume in Iron when passing from the Liquid to the 



Solid State, and an Instrument for observing the same. By T. 

 Wrightson, Memb. Inst. C.E., F.G.3 506 



MONDA Y, A UGUST 25, 1879. 



1. Report of Committee on Instruments for Measuring the Speed of Ships ... 508 



2. Report of Committee on the Ordnance Datum 508 



3. Report of Committee on Tidal Observations in the English Channel, &C...-508 



4. Report of Committee on the Patent Laws 508 



5. General Results of Experiments on Friction at High Velocities made in 

 order to ascertain the Effect of Brakes on Railway Trains. By Douglas 

 Galton, C.B., D.C.L., F.R.S 508 



6. Cowper's Writing Telegraph. By E. A. Cowper 520 



TUESDAY, A UGUST 26, 1879. 



1. On the proposed Canal across the Isthmus of Panama. By Captain 

 Bedford Pim, R.N., M.P 521 



2. Cowper's Hot Blast Stoves. By E. A. Cowper 522 



3. On the Details of an Experiment made to ascertain the Causes of the Dif- 



ference between the Quantity of Heat in Fuel, and the Quantity which 

 is utilised in the Work done by a Steam Engine. By Emerson Bain- 

 bridge, Assoc. M.C.E 523 



4. On the Law of the Power required for different speeds of the same steam 



vessel, illustrated, within the limits of experience, by a linear scale of 

 their relation. By Robert Mansel 526 



a2 



