362 Proceedings of Societies. 



Rev. W. Whewell, Tutor of Trinity, Steward of the Reading Room. 



Council. 

 J. King, Esq. Tutor of Queen's, 

 Rev. A. Sedgwick, Professor of Geology, 

 M. Ramsay, Esq. 

 Rev. J. Studholme, 

 Rev. R. Crawley, Tutor of Magdalene, 

 Rev. R. Jeffreys, 

 Rev. J. P. Higman, Tutor of Trinity. 



A r o». 15. — A communication was read by Rev. Professor Cumming, on 

 the Use of Gold Leaf in the Detection of Magnetism. 



A paper was read by Rev. W. Whewell, Fellow of the Camb. Phil. 

 Soc. on the Principles of Dynamics. 



Nov. 29. — A communication was read by Rev. Professor Cumming, on 

 the History of Electro-Magnetism. 



Dec. 13. — A paper was read by Rev. Professor Farish, Vice-President, 

 on the Construction of the Cogs of Wheels, and also on the Action of 

 Wheels with Cogs in the Form of Involutes of Circles. 



3. Proceedings of the Society fir Promoting the Useful Arts in Scotland. 



Dec. 21, 1824. — The Rev. Mr Somerville of Currie gave an account 

 of his contrivances for preventing the accidental discharge of fire-arms, 

 and exhibited to the society various guns to which they were applied. 



There was read also a Description of the original Machine for Drying 

 Linen, invented by the late Mr James Watt, and communicated by him 

 to Dr Brewster. 



An Account of Mr Thom of Rothesay's New Double Valve Sluice was 

 read. See this Number, p. 28S. 



Professor Wallace read a Report on Mr Burnet's Trigon for solving 

 Problems in Navigation. 



Jan. 4, 1825. — There was read a Report by Professor Wallace, Mr 

 Kinnear, and Dr Brewster, on Mr Sommerville's Contrivances for 

 Preventing the Accidental Discharge of Fire- Arms. 



A Description of the Single Valve Sluice, invented by Mr Thom of 

 Rothesay, was read. 



Jan. 18. — Mr Thomas Clark described to the Society his new Quick- 

 silver Pump, without Friction, and exhibited the Pump in Operation. See 

 this Number, p. 267. 



Mr James Jardtne gave his Report on the New Fangate Sluice, in- 

 vented by M. Blanker, and described the principles of its construction. 

 An account of it by Professor Moll will be given in our next Number. 



Feb. 8. — A Description of Dr Dyce's Universal Balance was read, and 

 the Balance itself exhibited. 



A notice of the late Mr Stodart's Alloys of Steel with Gold, Silver, 

 Platina, and Rhodium, was read, and specimens of them were exhibited 



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