BRITISH ASSOCIATION FOR 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 15 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 1904 may obtain the Volume for the Year at two-thirds 
of the Publication Price. 
REPORT or tuts SEVENTY-THIRD MEETING, at Southport, 
September 1903, Published at £1 4s. 
CONTENTS. 
PAGE 
Rules of the Association, Lists of Officers, Report of the Council, List of Com- 
mittees, Grants of Money, &c. = C * XxXVli-cxviii 
Address by the President, Sir Norman “Lockyer, K.C.B. 3 
Second Report on the Investigation of the Upper Atmosphere by means of 
Kites. : . 31 
Report on Magnetic Observations at Falmouth . : : ¢ : “ eos 
Report on Electrical Standards . - : . ‘ ‘ - 38 
On the Use of Vectorial Methods in Physics. By Professor O. HENRICI, F.R.S. 51 
Report on Meteorological Observations on Ben Nevis 56 
Report on the Theory of Point-groups.—Part III. By FRANCES HARDCASTLE . 65 
Eighth Report on Seismological Investigations . : : : Fy (i 
Fourth Report on Isomorphous Sulphonic Derivatives of Benzene. 85 
Report on Wave-length Tables of the Spectra of the Elements and Compounds 87 
