■iU 



REPORT — 1898. 



F. L. 0. Wads- 

 worth. 



H. F. Newall 



C. Pulfrich . 

 H. F. Newall . 



F. L. O. Wacls- 

 wortb. 



H. C. Lord . 



G. E. Hale and 

 F. L. O. Wads- 

 worth. 



F. L. O. 



worth. 



Wads- 



W. Huggms 



F. Walleraut 



M. Berthelot 



G. E. Hale 



Instrumental. 1896. 1897. 



The Modern Spectroscope. XVI. 

 A Simple Optical Device for com- 

 pletely Isolating or Cutting-out 

 any desired Portion of the DitErac- 

 tion Spectrum, and some further 

 Notes on Astronomical Spectro- 

 scopes. (March.) 



The Modern Spectroscope. XVII. 

 Description of a Spectroscope (the 

 Bruce Spectroscope) recently con- 

 structed for use in connection with 

 the 25-incli Refractor of the Cam- 

 bridge Observatory. (April.) 



A New Form of Eefractometer. 

 (April.) 



On the Spectroscope used in con- 

 nection with the 25-inch Refrac- 

 tor. (Read May 25.) 



A Suggestion for a Form of Spectro- 

 heliograph. (Read May 25.) 



The Modern Spectroscope. XVIII. 

 On the Conditions of Maximum 

 Efficiency in the Use of the Spec- 

 trograph. (May.) 



The Spectroscope of the Emerson- 

 McMillin Observatory. (June.) 



The Modern Spectroscope. XIX. 

 The Objective Spectroscope. 

 (June.) 



The Modern Spectroscope. XX. 

 On a New Form of Fluid Prism 

 without Solid Walls, and its Use in 

 an Objective Spectroscope. (Nov.) 



1897. 



On an Automatic Arrangement for 

 giving Breadth to Stellar Spectra 

 on a Photographic Plate. (Jan.) 



Sur un appareil permettant de 

 mesurer les indices de refraction 

 des mineraux des rochcs. (Read 

 Feb. 8.) 



Nouvel appareil pour I'application 

 de I'analyse spcctrale il la recon- 

 naissance des gaz. (Read Mar. 15.) 



Note on a Form of Spectrohelio- 

 graph suggested by Mr. H. F. 

 Newall. (March.) 



'Astrophys. J.' iii. IGO- 

 192 ; ' Beibliitter,' sxi. 

 334-335 (Abs.) 



'Monthly Not. R. A. S.' 

 Ivi. 98-110; 'Astrophys. 

 J.' iii. 266-281. 



'Astrophys. J.' iii. 259- 

 266. 



'Proc. Phil. Soc. Camb.' 

 ix. 179 (Abs.) 



'Proc. Phil. Soc. Camb.' 

 ix. 179-183. 



'Astrophys. J.' iii. 321- 

 347 ; ' Beiblatter,' xxi. 



335 (Abs.) 



' Astrophys. J.' iv. 50,-53. 



' Astrophys. J.' iv. 54-78 ;. 

 ' Beibliitter,' xxi. 335- 



336 (Abs.): 'Nature,' 

 liv. 256 (Abs.) 



' Astrophys. J.' iv. 274- 

 277; 'Nature,' Iv. 110- 

 111 (Abs.); 'Beibliitter,' 

 xxi. 862 (Abs.) 



'Astrophys. J.' v. 8-10; 

 ' Beibliitter,' xxi. 521 

 (Abs.) 



'C. R.' cxxiv. 315-317; 

 'Chem. Centr.' 1879, 

 I. 663-664 (Abs.); 'Bei- 

 bliitter,' xxi. 509 (Abs.) 



'C. R.' cx.xiv. 525-528 J 

 'Chem. Centr.' 1897, I. 

 940 (Abs.); 'Nature,' 

 Iv. 503 (Abs.); 'Chem. 

 News,' Ixxv. 179 (Abs.); 

 ' J. Chem. Soc' Ixxii. 

 298 (Abs.); ' Ann. Chim. 

 et Phys.' [7], xi. 43-47 ; 

 ' Beibliitter,' xxi. 514 

 (Abs.) 



'Astrophys. J.' v. 211- 

 213. 



