NOTICE. 



Owing to the length of several of the Communications with which we 

 have been favoured, we have considered it desirable, in order to avoid 

 delay in their publication, to issue a Double Number this month instead 

 of giving the usual Supplementary Number at the end of the Volume. 



BRITISH ASSOCIATION FOR THE ADVANCEMENT OF SCIENCE, 

 22 ALBEMAELE STEEET, LONDON, W. 



The next ANNUAL GENEEAL MEETING will be held at ABEEDEEN, 

 commencing on WEDNESDAY, September 9. 



President' Elect, 



The Eight Hon. SIE LYON PLAYFAIE, K.C.B., M.P., Ph.D., LL.D, 

 F.E.S.L. & E., F.C.S. 



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

 arrangement 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 Commit- 

 tees 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 pub- 

 lished Transactions of the Association, and the Council request that he will send 

 it, together with the original Memoir, by book-post, on or before August 12, 

 addressed thus : — " General Secretaries, British Association, 22 Albemarle Street, 



London, W. For Section " Authors who comply with this request, 



and whose Papers are accepted, will be furnished before the Meeting with 

 printed copies of their Eeports and Abstracts. If it should be inconvenient to 

 the Author that his Paper should be read on any particular days, he is requested 

 to send information thereof to the Secretaries in a separate note. 



Eeports on the Progress of Science, and of Eesearches intrusted to Individuals 

 or Committees, must be forwarded to the Secretaries, for presentation to the 

 Organizing Committees, accompanied by a statement whether the Author will 

 be present at the Annual Meeting. 



No Eeport, Paper, or Abstract can be inserted in the Eeport of the Associa- 

 tion unless it is in the hands of the Secretary before the conclusion of the Meeting. 



T. G. BONNEY, Secretary. 



Now ready, medium 4to, price Is. 

 PROBLEMS ON THE MOTIONS OF ATOMS. 

 By JOHN KINNEESLEY SMYTHIES, 



Barrister-at-Law of the Inner Temple. 

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



Seventh Edition. Price 2s. 6d. * 

 HYGROMETBICAL TABLES 

 Adapted to the use of the Dry and Wet Bulb Thermometer. 



By JAMES GLAISHEE, F.E.S. 

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



[ADVERTISEMENTS continued on ^rd page of Cover. 



