BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE, 



22 Albemarle Street, London, W. 

 The NEXT ANNUAL GENERAL MEETING will be held at BRADFORD, 

 commencing on Wednesday, September 17, 1873. 



President Elect. 

 J. PRESCOTT JOULE, D.C.L., LL.D., F.R.S. 



Notice to Contributors of Memoirs. — Authors are reminded that, under an ar- 

 rangement dating from 1871, the acceptance of Memoirs, and the days on which 

 they are to be read, are now, as far as possible, determined by Organizing Com- 

 mittees for the several Sections before the beginning of the Meeting. It has 

 therefore become necessary, in order to give an opportunity to the Committees of 

 doing justice to the several communications, that each Author should prepare an 

 Abstract of his Memoir, of a length suitable for insertion in the published Trans- 

 actions of the Association, and that he should send it, together with the original 

 Memoir, by book-post, on or before September 1, addressed thus — " General Se- 

 cretaries, British Association, 22 Albemarle Street, London, W. For Section 



" If it should be inconvenient to the Author that his paper should be 



read on any particular day, he is requested to send information thereof to the 

 Secretaries in a separate note. 



Information about Local Arrangements may be obtained by application to the 

 Local Secretaries, Bradford. 



GEORGE GRIFFITH, M.A., Assistant General Secretarv, Harrow. 



SELECTIONS FROM THE PORTFOLIOS OF THE EDITOR OF THE 

 LUNAR MAP AND CATALOGUE. 



The first issue of these Selections just ready, contains papers by the Rev. T. 

 W. Webb, Mr. Neison, Mr. Pratt, and the Editor, with illustrated Notices of 

 recent Observations and Comparisons with older observations. Copies of this 

 issue may be obtained by forwarding Post-office orders (payable to W. R. Birt) to 

 the Editor, addressed Cynthia Villa, Walthamstow, Essex. The amount of sub- 

 scription for this issue is Jive shillings. The second issue is expected to be ready- 

 in October. 



Nearly ready. 



REPORT OF THE FORTY-SECOND MEETING OF THE BRITISH 



ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE. 



Held at BRIGHTON, 18/2. 



John Murray, Albemarle Street. 

 THE LONDON, EDINBURGH, AND DUBLIN 



Philosophical Magazine and Journal of Science. 



A Journal devoted to Physics, Astronomy, Mechanics, Chemistry, Mineralogy, 

 and the Allied Sciences. Monthly, price 2s. 6d. 



Complete sets (in Numbers) may be obtained at the following prices : — 

 A few sets of the First Series, from 1798 to 1826 (wanting a few plates), in 

 68 volumes. Price ,£12. 



The Second Series, from 1827 to J832, in 11 volumes. Price £2 4s. 

 The Third Series, in 37 volumes, from 1832 to 1850. „ £6. 



Taylor and Francis, Red Lion Court, Fleet Street, E.C. 



[ADVERTISEMENTS continued on 3rd page of Cover. 



