BRITISH ASSOCIATION FOR THE ADVANCEMENT 



OF SCIENCE. 



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

 intermitted their Subscription, receive gratis aU 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. &d. 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. 



Astociates for the Meeting in 1902 may obtain the Volume for the Yeax at two-thirds 



of the Publication Price. 



REPORT OF THE SEVENTY-FIRST MEETING, at Glasgow, 

 September, 1901, Published at £1 is. 



CONTENTS. 



PAGB 



Rules of the Association, Lists of Officers, Report of the Council, List of Com- 

 mittees, Grants of Money, &c xxix-cxx 



Address by the President, Professor A. W. Rucker . . . . . . 3 



Report on the Determination of the Components of Magnetic Force on Board 



Ship 29 



Report on Electrical Standards 31 



Note on the Variation of the Specific Heat of Water. By Professor H. L. 



Callendak 34 



Report on Radiation in a Magnetic Field 39 



Interference and Polarisation of Electric Waves. By Professor Dr. G. Quincke 39 



Sixth Report on Seismological Investigations 40 



Report on the Calculation of Tables of certain Mathematical Functions . . 54 



Report on Meteorological Observations on Ben Nevis 54 



The Cleaning of Turbid Solutions, and the Movement of Small Suspended 



Particles by the Influence of Light. By Professor G. Quincke . . 60 



Twenty-second Report on Underground Temperature 64 



Note sur l'Unit6 de Pression. Par le Dr. C. E. GuiLLAUME .... 71 



Report on the Nature of Alloys 75 



Second Report on Isomorphous Derivatives of Benzene 78 



Report on Wave-length Tables of the Spectra of the Elements and Compounds 79 

 1902. 3 o 



