IV CONTENTS. 



1879. Trtgc 

 April 4. — William Crookes, Esq. — Molecular Physics in 



High Vacua .. .. .. 138 



„ 7.— General Monthly Meeting .. .. .. ..159 



„ 25. — Francis Galton, Esq. — Generic Images .. .. 161 



May 1. — Annual Meeting .. .. .. .. .. 170 



„ 2. — Professor John G. M'Kendrick. — The Physiological 



Action of An?esthGtics (Ahsfract deferred) .. 171 



5.— General Monthly Meeting 172 



„ 9. — Sir John Lubbock. — The Habits of Ants ,. .. 174 



„ 16. — Professor A. Cornu. — Optical Study of the Elas- 

 ticity of Solid Bodies .. .. .. .. 191 



„ 23.— W. H. Preece, Esq.— Multiple Telegraphy, or Du- 

 plex and Quadruplex Telegraphy .. .. 194 



„ 30. — Grant Allen, Esq. — The Colour-sense in Insects ; 



its Development and Keaction .. .. .. 201 



June 2.— General Monthly Meeting 202 



„ 6. — Professor Dewar. — Spectroscopic Investigation .. 204 



„ 18. — Frederick J. Bramwell, Esq. — The " Thunderer " 



Gun Explosion .. .. ,. .. .. 221 



July 7.— General Monthly Meeting .. .. .. .. 250 



Nov. 3.— General Monthly Meeting .. .. .. .. 252 



Dec. 1.— General Monthly Meeting ., .. .. .. 255 



1880. 



Jar.. 16. — Professor Dewau. — Investigations at High Tem- 

 peratures .. .. .. .. .. 257 



,, 23. — Dr. W. B. Carpenter. — Sea and Land in relation to 



Geological Time .. .. .. .. 268 



,, 30. — John Marshall, Esq. — Proportions of the Human 



Fi^rxu-c (no Abstract) .. .. .. ,. 282 



