1889. 



April 



May 



June 



July 

 Nov. 

 Dec. 



CONTENTS. 



5. — The Eev. Canon Ainger. — True and False Humour 

 in luiteratuYe (^no Abstract) 



12. — The Eight Hon, Lord Eayleigh. — Iridescent 



Crystals 



1. — Annual Meeting 



3. — Sir Henry E. Eoscoe. — Aluminium 



6. — General Monthly Meeting .. 



10. — Professor Dewar. — Optical Properties of Oxygen 

 and Ozone .. 



17. — Professor Silvanus P. Thompson. — Optical Torque 



24. — The Eev. S. J. Perry. — The Solar Surface during 

 the last ten years .. 



31. — Professor Demetri Mendeleef. — An attempt to 

 apply to Chemistry on^ of Newton's principles 



3.— General Monthly Meeting 



7. — Archibald Geikie, Esq. — Eecent Eesearches into 

 the Origin and Age of the Highlands of Scot- 

 land and . the West of Ireland 



14.— C. V. Boys, Esq. -Quartz Fibres 

 1. — General Monthly Meeting .. 



4. — General Monthly Meeting .. 



2. — General Monthly Meeting .. 



Index to Volumes I. to XII. 



Vll 



Page 

 446 



447 

 450 

 451 

 464 



468 

 474 



498 



506 



528 



547 

 563 



565 



569 



681 



