240 



Popular Science Monthly 



spread over a wide area. It 

 can be used with perfect safety 

 in the presence of gasoline, 

 broken gas pipes, chemicals 

 and other explosive fumes. 

 This new light is already find- 

 ing a wide use, not only in fire- 

 fighting, but also wherever 

 light in abundance is re- 

 quired and where it is 

 neither possible nor con- 

 venient to run service wires. 

 Where much guarding of 

 factories must be done, as 

 at present, the lamp is like- 

 wise of great value. 



A new searchlight has been 

 brought out by Edison which 

 operates on a six-volt storage 

 battery. Focus may be al- 

 tered to throw either a wide 

 or a concentrated beam. It 

 is extremely useful at fires 



Fighting Fires With 

 Searchlights 



WHEN Thomas A. Edi- 

 son's phonograph works 

 at Orange, New Jersey, burned 

 some time ago and he saw 

 firemen confusedly fighting the flames, 

 handicapped and blinded by the lack of 

 light, his active mind grasped the oppor- 

 tunity to solve the fire fighting problem, 

 and as a result we are indebted to him for 

 the portable electric light called by its 

 inventor the "sunlight of night." 



This portable searchlight consists of a 

 light, easily handled case of indestructi- 

 ble steel, carrying an especially designed 

 set of Edison's storage cells and having 

 attached to it a powerful electric light 

 with a big projector and intensifying re- 

 flector. When the battery is fully 

 charged, the lamp will project a light of 

 6,000 candle power for 4.5 hours, or 

 > 2,200 candle power for eight hours. The 

 lamp and case weigh forty-one pounds 

 and they may be carried by hand or at- 

 tached to an automobile or fire-engine. 



The rays can be focused upon one 

 spot to shed thousands of candle power of 

 concentrated light upon a single window, 

 or the beams may be quickly changed to 



T 



A Car For Use Where 

 Man -Power Is Cheap 



HE odd combination of 

 a man propelled vehi- 

 cle, with street car rails is to 

 be found in Otsomiya, Japan. 

 Man-power being cheaper, 

 in that section of Japan, than 

 horse-power, the street-car 

 magnates of the town do not 

 allow humane cciisiderations 

 to interfere with their divi- 

 dends. 



The car shown in the illus- 

 tration has seats for four 

 passengers. The man behind the car is 

 the human motor that propels the con- 

 veyance. 



The passengers must have true Oriental 

 patience, because this method of trans- 

 portation cannot be exactly speedy. 



Japainst stKcl car is propelled by a 

 coolie's shoving one foot along the ground 



