CONTENTS. Vll 



Page 

 Compai'ison and Reduction of Mag-iietic Observations. — Iteport ot the Com- 

 mittee, consisting of Professor AV. G. Adams (Chairman), Mr. C. Cheee 

 (Secretary), Lord Kelvin, Professor G. H. Darwin, Professor G. Chrtstal, 

 Professor A. Schuster, (Japtain E. W. Creak, The Astronomer Royal, 

 Mr. William Ellis, and Professor A. W. Rijckee. (Drawn up by the 

 Secretary) 209 



Analysis of the Results from the Kew Declination and Horizontal 

 Force Magnetographs during the selected " Quiet " Days of the 

 Five Years 1890-94, By C. Cheee, Sc.D 209 



Sections 1-3. — Introductory 209 



Sections 4-6. — Non-cyclic Nature of Results obtained from " Quiet " 

 Days 210 



Sections 7-8. — Tables of Diurnal Inequalities for each Month of Year, 

 for Quarters, Halves, and Whole Year 213 



Sections 9-10. — Harmonic Analysis of Diurnal Inequalities ; Times 

 of Maxima, &c 216 



Sections 11-12. — Resultant of Horizontal Forces to which Diurnal 

 Inequality is due , 218 



Sections 13-15. — Variation of Ranges and Sums of Departures from 

 Mean for Day throughout the Year, with Harmonic A.nalysis of Ranges 221 



Sections 16-20. — Annual Inequalities (or Cyclic Part of Yearly 

 Variations) 228 



The Teaching of Science in Elementary Schools. — Report of the Committee, 

 consisting of Dr. J. H. Gladstone (Chairman), Professor H. E. Armstrong 

 (Secretary), Professor W. R. Dunstan, Mr. George Gladstone, Sir John 

 Lttbjbock, Sir Philip Magnus, Sir H. E. Roscoe, and Professor S. P. 

 Thompson 228 



Quantitative Analysis by means of Electrolysis. — Second Report of the Com- 

 mittee, consisting of Professor J. Emerson Reynolds (Chairman), Dr. C. A. 

 KoHN (Secretary), Professor P. Frankland, Professor F. Clowes, Dr. Hugh 

 Marshall, Mr. A. E. Fletcher, Mr. D. H. Nagel, Mr. T. Turner, and 

 Mr. J. B. Coleman 235 



The Bibliography of Spectroscopy. — Report of the -Committee, consisting of 

 Professor H. McLeod, Professor W. C. Roberts Austen, Mr. H. G. Madan, 

 and Mr. D. H. Nagel 263 



The Action of Light upon Dyed Colours. — Report of the Committee, consisting 

 of Dr. T. E. Thorpe (Chairman), Professor J. J. Hummel (Secretary), Dr. 

 W. H. Perkin, Professor W. J. Russell, Captain W. de W. Abney, 

 Professor W. Stroud, and Professor R. Meldola. (Drawn up by the 

 Secretary) 263 



Isomeric Naphthalene Derivatives. — Ninth Report of the Committee, con- 

 sisting of Professor W. A. Tilden and Professor H. E. Armstrong. 

 (Drawn up by Professor Armstrong) 272 



Wave-length Tables of the Spectra of the Elements and Compounds. — Report 

 of the Committee, consisting of Sir H. E. Roscoe (Chairman), Dr. Mar- 

 shall Watts (Secretary), Mr. J. N. Lockyer, Professors Dewar, G. D 

 Liveing, a. Schuster, W. N. Hartley, and Wolcott Gibbs, and 

 Captain Abney. (Drawn up by Dr. Watts) 273 



The Production of Haloids from Pure Materials. — Report of a Committee con- 

 sisting of Professor H. E. Armstrong, Professor Wyndham R. Dunstan, 

 Mr. C. H. BoTHAMLET, and Mr. W. A. Shenstonb (Secretary) 341 



