BEITISH ASSOCIATION FOE THE ADVANCEMENT 



OF SCIENCE. 



Life Members (since 1845), and all Annnal 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. Qd. 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. 



Atsociates for the Meeting in 1894 may obtain the Volume for the Year at two-thirds 



of the Publication Price. 



REPORT OF THE SIXTIETH MEETING, at Leeds, August 1890, 

 Puhlished at £\ 4s. 



Contents: — Report of the Corresponding Societies Committee; — Third Report 

 of the Committee to arrange an Investigation of the Seasonal Variations of Tempera- 

 ture in Lakes, Rivers, and Estuaries in various parts of the United Kingdom, in co- 

 operation with the Local Societies represented on the Association ; — Report of the 

 Committee for constructing and issuing Practical Standards for use in Electrical 

 Measurements ; — Fifth Report on Electrolysis in its Physical and Chemical Bearings ; 

 — Sixth Report on the best methods of recording the direct Intensity of Solar Radia- 

 tion ; — Report of the Committee for co-operating with Dr. Kerr in his Researches on 

 Electro-optics ; — Report on Molecular Phenomena associated with the Magnetisation 

 of Iron ; — Tenth Report on the Earthquake and Volcanic Phenomena of Japan ; — 

 Sixth Report on the best means of comparing and reducing Magnetic Observations ; 

 — Report of the Committee for co-operating with the Scottish Meteorological Society 

 in making Meteorological Observations on Ben Nevis ; — Sixth Report of the Com- 

 mittee for promoting Tidal Observations in Canada ; — Report on the present state of 

 our Knowledge in Electrolysis and Electro-chemistry ; — Report on the Preparation of 

 a new series of Wave-length Tables of the Spectra of the Elements and Compounds ; 

 — Report on the Bibliography of Spectroscopy ; — Fourth Report on the Influence of 

 Silicon on the Properties of Iron and Steel ;— Second Report on the best method of 



