CONTENTS. XIX 



MONDAY, AUGUST 19, 1878. 



Page 



1. Report of the Committee on the Patent Laws 697 



2. Report of Committee on the Use of Steel for Structural Purposes 697 



•3. Report of Committee on the Steering of Screw Steamers 697 



4. On the Steering of Screw Steamers. By Professor Osborne Reynolds, 

 F.R.S 697 



5. General Results of some recent Experiments upon the Co-efficient of 

 Friction between Surfaces moving at High Velocities. By Captain 

 Douglas Galton, C.B., F.R.S 697 



6. Recent Improvements in Telegraphic Apparatus. By W. H. Preece 697 



7. The Filtration of Salt from Sea Water into Wells in the Trias Sandstone. 



By I. Roberts 697 



8. Description of a new Lift Bridge for the Midland Great Western Railway 

 over the Royal Canal at Newcomen Bridge, Dublin. By Bindon B. 

 Stonet, M.A., M. Inst. C.E 697 



9. The Irish Siren Fog Signal. By J. R. Wigham 698 



10. A New Form of Mining Lamp. By Dr. Charles Ball 698 



TUESDAY, A UGUST 20, 1878. 



1. Report of Committee on Instruments for Measuring the Speed of Ships ... 699 



2. Report of Committee on the Datum Level of the Ordnance Survey 699 



3. Report of Committee on Tidal Observations in the English Channel, &c... 699 



4. The River Shannon : its present State, and the Means of Improving the 

 Navigation and the Drainage. By James Ltnam 699 



5. On the Present State of Electric Lighting. By James N. Shoolbred, 

 B.A., M. Inst. C.E 706 



6. On a Process for Cutting through Sand-bars in Rivers and Harbour En- 

 trances. By C. Bergeron, C.E 708 



WEDNESDAY, AUGUST 21, 1878. 



1. On the Use of Wind Power for Raising Water, Disposal of Sewage, and 

 Drainage, with special reference to Ireland. By James Price, M. Inst. 

 C.E., M.A.I 709 



2. A System of Ventilation by Means of Fans and Punkahs worked by Com- 

 pressed Air for use in Hospitals and Barracks in India and other Tropical 

 Climates. By the Hon. R. C. Parsons 710 



3. On the Dublin Waterworks. By Parke Neville 712 



4. The Design and Use of Boilers. By F. J. Rowan, M. Inst. M.E 712 



5. On the System of Dredging usually employed in the United States. By 

 Robert Briggs 713 



6. On a New Ship-raising Machine. By Thomas A. Dillon 713 



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