xvi Illustrations 



FACING 

 PACE 



DAILY DURATION OF SUNSHINE IN JULY ..:... 779 



STORM-TRACK MAP OF THE NORTH ATLANTIC ..... 782 



THE RAPID VARIABILITY OF TEMPERATURE ... . 782 



How THE ANNUAL RAINFALL is DISTRIBUTED IN THE BRITISH ISLES . 783 



BANKS OF CIRRO-STRATUS CLOUDS WITH CIRRO-CUMULUS CLOUDS 

 BETWEEN, WITH A SMALL DARK PATCH OF CUMULUS THREE MILES 

 BELOW THEM .786 



GOSSAMER WEBS OF CIRRUS CLOUD, HIGHEST UP OF ALL. JUST EQUAL 



IN HEIGHT ON THE AVERAGE TO THE SUMMIT OF MOUNT EVEREST . 787 



THOMAS A. EDSION .......... 794 



Copyright U. & U. 



AN ELECTRIC COAL-CUTTER ......... 795 



Reproduced by permission from The Romance of Modern Electricity 

 (Seeley, Service & Co.). 



LAYING A SUBMARINE CABLE ........ 798 



Reproduced by permission of the Commercial Cable Company. 



SECTIONS OF ARMOURED CABLES FOR THE CONVEYANCE OF ELECTRIC 



CURRENT UNDERGROUND ......... 799 



Reproduced by permission of Messrs. Siemens Bros., Ltd. 



A MARVEL OF POWER TRANSMISSION BY OVERHEAD CONDUCTORS . . 800 

 Reproduced by permission of the British Aluminium Co., Ltd. 



A COPPER RING HELD OVER THE POLE OF AN ALTERNATING CURRENT 

 ELECTRO-MAGNET is STRONGLY REPELLED AND JUMPS UP IN THE AIR 

 WHEN RELEASED .......... 800 



Reproduced by permission from Fifty Years of Electricity (The Wireless 

 Press, Ltd.). 



A VIVID FLASH OF FORK LIGHTNING TAKEN OVER HOUSE-TOPS . . 801 

 From the Romance of Modern Electricity (Seeley, Service & Co.). 



How AN ELECTRIC TRAIN PICKS UP CURRENT ..... 801 

 By permission of Underground Electric Railways Co., Ltd. 



A UNIQUE ELECTRIC RAILWAY . . . 802 



Reproduced by permission from The Romance of Modern Electricity 

 (Seeley, Service & Co., Ltd.). 



ELECTRIC TRANSPORTER BRIDGE ........ 802 



Photo: W. H. Mack, Runcorn. 



INTERIOR OF LOTS ROAD POWER STATION, CHELSEA .... 803 

 By permission of Underground Electric Railways Co., Ltd. 



