CONTENTS. 



IX 



LIST OF ILLUSTRATIONS. 



Hertz's Electrical Researcbes : 



Fig. 1 



Fig. 2 



l^ig-:5 



Fig. 4 



Figs. ;"),() 



Fig. 7 



Fig. 8 



J'ig. 9 



Fig. 10 



Fig. 11 



Fig. 12 



Trouton's Electrical Experiments: 



Fig. 1 



Fig. 2 



Fig. 3 



Fig. 4 



Pago. 



147 

 148 



1.50 

 151 

 154 

 155 

 163 

 166 

 169 

 173 

 185 



191 

 193 

 195 



196 



Pace. 



Troutou's Electrical Expcrimeuts — 

 Continued. 



Fig. 5 



Fig. 6 



Fig. 7 



Progress in Meteorology : 



Fig. 1 ^ 



Aerial Locomotion : 



Figs. 1, 2 



Fig. 3 , 



Figs. 4, 5, G 



Movements of the Earth's Cru.st: 



Fig. 1 



Tho Terrestrial Globe at Paris Ex- 

 position : 



Fig. 1 



Fi<»-. 2 



198 

 200 

 201 



241 



319' 

 320 

 321 



352 



74(> 

 747 



Index to the volume. 



