COMMITTEES APPOINTED BY THE GENERAL COMMITTEE. 

 2. Not receiving Grants of Money — continued. 



Ixxxi 



Subject for Investigation or Purpose 



Members of the Committee 



The Collection and Identification of 

 Meteoric Dust. 



The Eate of Increase of Underground 

 Temperature downwards in various 

 Localities of dry Land and under 

 Water. 



Comparing and Reducing Magnetic Ob- 

 servations. 



Considering the best Methods of Ee- 

 cording the Direct Intensity of Solar 

 Kadiation. 



To co-operate with Dr. Kerr in his 

 researches on Eiectro-optics. 



The various Phenomena connected with 

 the recalescent Points in Iron and 

 other Metals. 



To consider the establishment of a 

 National Physical Laboratory for the 

 more accurate determination of Phy- 

 sical Constants, and for other Quanti- 

 tative Research, and to confer with 

 the Council of the Association. 



Modes of measuring the Optical Con- 

 stants of Microscopic, Photographic, 

 and other Lenses, and of specifying 

 and enumerating the Properties of 

 their Combinations. 



1891. 



Chairman. — Mr. John Murray. 



Secretary. — Mr. John Murray. 



Professor Schuster, Sir William Thom- 

 son, the Abbe Renard, Mr. A. Buchan, 

 the Hon. R. Abercromby, and Dr. M. 

 Grabham. 



Chairman. — Professor Everett. 



Secretary. — Professor Everett. 



Professor Sir William Thomson, Mr. G. 

 J. Symons, Sir A. C. Ramsay, Sir A. 

 Geikie, Mr. J. Glaisher, Mr. Pengelly, 

 Professor Edward Hull, Professor 

 Prestwich, Dr. C. Le Neve Foster, Pro- 

 fessor A. S. Herschel, Professor G. A. 

 Lebour, Mr. A. B. Wynne, Mr. Gallo- 

 way, Mr. Joseph Dickinson, Mr. G. F. 

 Deacon, Mr. E. Wethered, Mr. A. Stra- 

 han, and Professor Michie Smith. 



Chairman. — Professor W. G. Adams. 



Secretary. — Professor W. G. Adams. 



Sir W. Thomson, Professors G. H. Dar- 

 win and G. Chrystal, Mr. C. H. Carp- 

 mael, Professor Schuster, Mr. G. M. 

 Whipple, Captain Creak, the Astro- 

 nomer Royal, Mr. William Ellis, and 

 Professor A. W. Riicker. 



Chaiiinan. — ^Sir G. G. Stokes. 



Secretary. — Mr. G. J. Symons. 



Professor Schuster, Mr. G. Johnstone 

 Stoney, Sir H. E. Roscoe, Captain 

 Abney, Mr. Whipple, and Professor 

 M'Leod. 



Clmirman. — Dr. John Kerr. 



Secretary. — Mr. R. T. Glazebrook. 



Sir W. Thomson and Professor Riicker. 



Chairman. — Professor Fitzgerald . 



Secretary. — Professor Barrett. 



Dr. John Hopkinson, Mr. R. A. Hadfield, 



Mr. Trouton, Professor Roberts-Austen, 



and Mr. H. F. Newall. 



Chaiiinan. — Professor Oliver J. Lodge. 



Secretary. — Mr. R. T. Glazebrook. 



Sir William Thomson, Lord Rayleigh, 

 Professors J. J. Thomson, Riicker, 

 Clifton, Fitzgerald, Carey Foster, and 

 J. Viriamu Jones. 



Chairman. — Professor G. C. Foster. 

 Secretary. — Professor S. P. Thompson. 

 Mr. R. T. Glazebrook, J. Walker, Sir 



Howard Grubb, Mr. Whipple, and 



Captain Abney. 



e 



