January 21st, ipij-] PROCEEDINGS. xiii 



General Meeting, January 21st, 19 13. 



The President, Professor F. E. Weiss, D.Sc, F.L.S., 

 in the Chair. 



Mr. Ch.'XRLes Duncan Stewart, B.Sc, T/ie Schools, 

 Cheadle Hulme, Stockport, was elected an ordinary member of 

 the Society. 



Ordinary Meeting, January 21st, 19 13. 



The President, Professor F. E. Weiss, D.Sc, F.L.S., 

 in the Chair. 



A vote of thanks was given to the donors of the books upon 

 the table. These included the following : — " Katalog und 

 Ephemeriden verdnderlicher Sterne fiir IQIJ," by Ernst Hertwig 

 (8vo., Leipzig, 19 13), presented by the Remeis Sternwarte, 

 Bamberg; "■ Les Prix Nobel en ipii" (8vo., Stockholm, 191 2), 

 presented by the Academic Royale Suedoise des Sciences, 



Stockholm; "A Barometer Mafiual " 7th ed. (Svo., 



London, 191 2), and other publications presented by the 

 Meteorological Office, London; and 'M;/ Attempt to Establish 

 the First Principles of Chemistry^' vol. i, by Thomas Thomson 

 {8vo., London, 1825), presented by Mr. E. L. Rhead, M.Sc.Tech., 

 F.LC 



Dr. H. F. Cov^ARD repeated the experiments shown at a 

 previous meeting, carried out by himself and Wx. F. Brinslev, 

 on the formation of vortex rings of flame in a mixture of air with 

 about 6 per cent, of hydrogen. 



A paper, entitled "Experiments on Abel's theory 

 that incombustible dusts act catalytically on igniting 

 weak mixtures of methane and air," by Professor 

 Harold B. Dixon, M.A., F.R.S. and Harry Marchanton 

 Lowe, B.Sc, was read by Professor Dixon. 



The use of fine incombustible dusts as a means of preventing 

 explosions of coal dust in mines has brought into prominence 



