IV CONTENTS. 



Page 

 April 8. — James Paget, Esq. — On the Chronometry of Life . 117 

 „ 12. — Professor Owen — Summary of the Succession in 

 time, and Geographical Distribution of Eecent 



and Fossil Mammalia 109 



„ 15. — Sir Charles Lyell — On the Consolidation of Lava 

 on Steep Slopes, and on the Origin of the Conical 



Form of Volcanoes 1 25 



May 2. — Annual Meeting 132 



„ 6.— Robert Druitt, M.D.— On Houses in relation to 



Health 133 



„ 9.— General Monthly Meeting 137 



„ 13. — "William Hopkins, Esq. — On the Earth's Internal 



Temperature and the Thickness of its Solid Crust . 139 

 „ 20. — John Hall Gladstone, Esq. — On the Colours of 



Shooting Stars and Meteors . . . . .143 



„ 27. — William Pengelly, Esq. — On the Ossiferous 



Caverns and Fissures of Devonshire . . .149 

 June 3. — Professor Huxley — On the Persistent Types of 



Animal Life ....... 151 



„ 6, — General Monthly Meeting — Letter and Present from 



Jacob Bell, Esq 154 



„ 10. — Professor Tyndall — On the Transmission of Heat 



through Gases . . . . , . .155 

 „ 17.— Professor Faraday— On Phosphorescence, Fluo- 

 rescence, &c 159 



July 4. — General Monthly Meeting 163 



Nov. 7.— General Monthly Meeting 165 



Dec. 5. — General Monthly Meeting 167 



1860. 



Jan. 20. — Professor Tyndall — On the Influence of the Mag- 

 netic Force upon the Electric Discharge . .169 

 „ 27. — Professor Owen — On the Cerebral Classification of 



the Class Mammalia . . . . . .174 



Feb. 3. — Frederick Field, Esq. — On the Mineral Treasures 



of the Andes . . . ' . . . .190 



„ 6. — General Monthly Meeting . . . . .193 



„ 10. — Professor Huxley — On Species and Races, and their 



Origin 195 



