800 



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: 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 1911 may obtain the Volume for the Year at 

 two-thirds of the Publication Price. 



KEPORT of the EIGHTIETH MEETING, at Sheffield, August 31, 1910, 

 Published at £1 4s. 



CONTENTS. 



PAGE 



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



Committee, Grants of Money, &c xxxiii-cxliv 



Address by the President, Rev. Prof. T. G. Bonney, F.R.S. ... 3 



Report on the further Tabulation of Bessel Functions 37 



Report on Electrical Standards 38 



Report on the Work of Establishing a Solar Observatory in Australia . 42 



Fifteenth Report on Seismological Investigations ..... 44 



Ninth Report on the Investigation of the Upper Atmosphere ... 72 



Report on Magnetic Observations at Falmouth Observatory ... 74 

 Report on the Measurement of a Further Portion of the Geodetic Arc of 



Meridian in Africa 75 



Report on the Provision for the Study of Astronomy, Meteorology, and 



Geophysics in the Universities of the British Empire .... 77 



Report on Electroanalysis "... 79 



Report on Dynamic Isomerism 80 



Report on the Study of Hydro-aromatic Substances 82 



Report on the Transformation of Aromatic Nitroamines and Allied Sub- 

 stances ............. 85 



Report on the Study of Isomorphous Derivatives of Benzene Sulphonic Acid 100 



Report on the Erratic Blocks of the British Isles 100 



Report on the Faunal Succession in the Carboniferous Limestone (Avonian) 



of the British Isles 106 



Report on the Igneous and Associated Rocks of the Glensaul and Lough 



Nafooey Areas, Cos. Mayo and Galway 110 



Fifth Report on the Composition and Origin of the Crystalline Rocks 



of Anglesey 110 



Report on the Excavation of Critical Sections in the Palteozoic Rocks of 



Wales and the West of England . 113 



