iv CONTENTS. 



Page 

 Fourth Report of tlie Committee, consisting of Professor Balfour Stewart 

 (Secretary), Professor W. Grtlls Adams, Mr. W. Lant Carpenter, Mr. 

 C. H. Cakpmael, Mr. W. H. Christie (Astronomer Royal), Professor G. . 

 Chrxstal, Captain Creak, Professor G. H. Darwin, Mr. William 

 Ellis, Sir J. H. Lefrot, Professor S. J. Perrt, Professor Schuster, 

 Professor Sir W. Thomson, and Mr. G. M. Whipple, appointed for the 

 purpose of considering the best means of Comparing and Reducing Magnetic 

 Observations 28 



Fourth Report of the Committee, consisting of Professor G. Forbes (Secretary), 

 Captain Abney, Dr. J. Hopkinson, Professor W. G. Adams, Professor G. C. 

 Foster, Lord Ratleigh, Mr. Preece, Professor Schuster, Prorfessor Dewar, 

 Mr. A. Vernon Haecourt, Mr. H. Trueman Wood, Sir James DoaGLAss, 

 Professor H. B. Dixon, and Mr. Dibdin, appointed for the purpose of 

 reporting on Standards of Light 3D 



Report of the Committee, consisting of Professor Crum Brown (Secretary), 

 Mr. Milne-Home, Dr. John Murray, Lord McLaren, and Dr. Buchan, 

 appointed for the purpose of co-operating with the Scottish Meteorological 

 Society in making Meteorological Observations on Ben Nevis 49 



Second Report of the Committee, consisting of Professors Tilden, McLeod, 

 Pickering, Ramsay, and Young and Drs. A. R. Leeds and Nicol (Secre- 

 tary), appointed for the purpose of reporting on the Bibliography of Solution 54 



Report of the Committee, consisting of Professor G. Carey Foster, Sir 

 William Thomson, Professor Ayrton, Professor J. Perry, Professor W. 

 G. Adams, Lord Rayleigh, Dr. 0. J. Lodge, Dr. John Hopkinson, Dr. 

 A. Muirhead, Mr. W. H. Preece, Mr. Herbert Taylor, Professor Everett, 

 Professor Schuster, Dr. J. A. Fleming, Professor G. F. Fitzgerald, 

 Mr. R. T. Glazebrook (Secretary), Professor Chrystal, Mr. H. Tomlin- 

 SON, Professor W. Garnett, Professor J. J. Thojison, Mr. W. N. Shaw, 

 Mr. J. T. Bottomley, and Mr. T. Gray, appointed for the purpose of 

 constructing and issuing Practical Standards for use in Electrical Measure- 

 ments 66 



Second Report of the Committee, consisting of Professors Tilden and W. 

 Chandler Roberts- Austen and Mr. T. Turner (Secretary), appointed for 

 the purpose of investigating the Influence of Silicon on the properties of 

 Steel. (Drawn up by Mr. T, Turner) 69 



Third Report of the Committee, consisting of General J. T. Walker, Sir 

 William Thomson, Sir J. 11. Lefroy, General R. Strachey, Professors 

 A. S. Herschel, G. Chrystal, C. Niven, J. H. Poynting (Secretary), and 

 A. Schuster, and Mr. C. V. Boys, appointed for the purpose of inviting 

 designs for a good Differential Gravity Meter in supersession of the pen- 

 dulum, whereby satisfactory results may be obtained at each station of 

 observation in a few hours instead of the many days over which it is neces- 

 sary to extend pendulum observations 72 



Report of the Committee, consisting of Professor H. E. Armstrong, Mr. 

 J. T. Dunn, Professor W. R. Dunstan (Secretary), Dr. J. H. Gladstone, 

 Mr. A. G. Vernon PIarcourt, Mr. Francis Jones, Professor H. McLeod, 

 Professor Meldola, Mr. Pattison Muir, Dr. W. J. Russell, Mr. W. A. 

 Shenstone, Professor Smithells, and Mr. Stallard, appointed for the 

 purpose of inquiring into and reporting on the present methods of teaching 

 Chemistry. (Drawn up by Professor Dunstan) 73 



Report of the Committee, consisting of Dr. Russell, Captain Abney, Professor 

 Hartley, and Dr. A. Richardson (Secretary), appointed for the investiga- 

 tion of the action of Light on the Hydracids of Halogens in presence of 

 Oxygen. (Drawn up by Dr. A. Richardson) 89 



Second Report of the Committee, consisting of Professors Tilden and 



