vi PREFACE TO VOLUME I. 



period 1890 1900. In place of the expressions given on p. 124 for this 

 period, 1890 1900, the more exact values of the coefficients are 

 For Satellite II + s 756 sin (5u-2u t - 17 7), 

 Satellite III + 2'233 sin (5-2 - 177), 

 Satellite IV +12'33 sin (5u-2u t - 177). 



The full paper on the attraction of an indefinitely thin ellipsoidal 

 shell on an external point, which was given before the Cambridge Philo- 

 sophical Society, has been reproduced (see p. 414 of this volume) by the 

 aid of the notes taken by Professor Greenhill at Professor Adams' lectures 

 on the Figure of the Earth. 



In 1876 a translation of the paper on the discovery of the planet 

 Neptune was published in Liouville's Journal de Mathematiques with the 

 addition of an Appendix by Professor Adams which forms the seventh 

 paper of this Volume. In March 1867, a paper " Sur les dtoiles filantes 

 de Novembre " was published in the Paris Acad. Sci. Compt. Rend., 

 LXIV. which was also communicated to, but not published by, the 

 Cambridge Philosophical Society. A paper on the lunar inequalities due 

 to the ellipticity of the Earth was overlooked when the papers on 

 Astronomy were being printed : these papers are printed at the end of 

 this Volume. 



The biographical notice prefixed to this volume has been written by 

 Dr J. W. L. Glaisher. 



My thanks are due to Mr W. H. Wesley, the Assistant Secretary 

 of the Royal Astronomical Society, for kind help which he has given me. 



W. GRYLLS ADAMS. 



KING'S COLLEGE, 



LONDON. 

 Oct. 8th, 1896. 



