CONTENTS. xiii 

 PAET II CONTEIBUTIONS TO SCIENCE. 



PAGE 



1. EXPERIMENTS ON COLOUR VISION, AND OTHER CONTRIBU- 



TIONS TO OPTICS . ] j. \ . . 465 



2. INVESTIGATIONS RESPECTING ELASTIC SOLIDS . . 491 



3. PURE GEOMETRY '. , . . . 496 



4. MECHANICS . . ' . . . 498 



5. SATURN'S KINGS . . . . . 501 



6. FARADAY'S LINES or FORCE, AND MAXWELL'S THEORY OF 



THE ELECTROMAGNETIC FIELD, INCLUDING THE 

 ELECTROMAGNETIC THEORY OF LIGHT, AND OTHER 



INVESTIGATIONS IN ELECTRICITY . . . 513 



7. MOLECULAR PHYSICS . . , . 559 



PAET III. POEMS. 



1. JUVENILE VERSES AND TRANSLATIONS . V ^ . 577 



2. OCCASIONAL PIECES '..' 593 



3. SERIO-COMIC VERSE , 609 



INDEX 653 



