BEITISH ASSOCIATION FOE THE ADVANCEMENT 



OF SCIENCE. 



Life Members (since 1845), and all Annual Members who have not 

 intermitted their Subscription, receive gratis all Reports published after 

 the date of their Membership. Any other volume they require may be 

 obtained on application at the Office of the Association, Burlington 

 House, Piccadilly, London, W., at the following prices, viz. — Reports for 

 1831 to 1874! {of which more than 16 copies remain), at 2s. 6d. per volume ; 

 after that date, at two-thirds of the Publication Price. A few sets, from 

 1831 to 1874 inclusive, may also be obtained at £10 per set. 



Associates for the Meeting in 1903 may obtain the Volume for the Year at two-thirds 



of the Publication Price. 



REPORT OF THE SEVENTY-SECOND MEETING, at Belfast, 

 September, 1902, Published at £1 4s. 



CONTENTS. 



PAGB 



Eules of the Association, Lists of Officers, Keport of the Council, List of Com- 

 mittees, Grants of Money, &c xxix-cxxviii 



Address by the President, Professor James Dewar 3 



Report on Electrical Standards 53 



Report on Comparing and Reducing Magnetic Observations .... 58 



Seventh Report on Seismological Investigations 59 



Report on Magnetic Observations at Falmouth 75 



Report on the Investigation of the Upper Atmosphere by Means of Kites . . 77 



Report on the Theory of Point-groups. — Part II. By Fkances Haedcastlb . 81 



Report on Meteorological Observations on Ben Nevis 93 



Report of the Committee for Collecting Statistics concerning the Training of 



Chemists employed in English Chemical Industries 97 



Fourth Interim Report on the Relation between the Absorption Spectra and 



Chemical Constitution of Organic Substances 99 



Hydro-aromatic Compounds with Single Nucleus^ By Dr. A. W. Crossley . 120 



Report on Wave-length Tables of the Spectra of the Elements and Compounds 137 



Report on the Nature of Alloys 175 



Report on Isomeric Naphthalene Derivatives 176 



Third Report on Isomorphous Sulphopic Derivatives of Benzene . . .180 



Our Present Knowledge of Aromatic Diazo-compounds> By Dr. G. T. Mobgan 181 



1903. 3 N 



