THE WORLD'S ADVANCE 



175 



NEW USE OF GRAPHITE SAVES 

 INNER TUBES OF TIRES 



Coated with graphite instead of soap- 

 stone, which was formerly used, the in- 

 ner tubes of automobile tires have been 

 discovered to last twice as long as under 

 the old process. This new process of 

 coating is being used by a western tire 

 concern in the manufacture of their tires. 

 Graphite prevents blooming, deteriora- 

 tion, and absolutely eliminates friction 

 between the inner tube and casing. It 

 is impossible to destroy graphite, wear 

 it out or make it change its form, the 

 latter being the main drawback in the use 

 of soapstone. 



MOTOR CANOE OF NOVEL DESIGN 



A Japanese photographer of Battle 

 Creek, Michigan, has built -a most un- 

 usual water craft in the form of a motor 

 canoe. He took an ordinary canoe and 

 placed in the bow a detachable motor 

 boat arrangement, which pulls the canoe 

 forward when the motor is operated re- 

 versely. At the stern of the canoe he 

 rigged up an aeroplane propeller, which 

 is driven by a separate engine. In order 

 to insure safety, pontoons were fastened 

 on either side of the craft, and the 

 steering gear of both motors was placed 

 within easy reach near the center of the 

 canoe. The motor-canoe is said to be 

 much safer than the average canoe, and 

 considerable speed can be developed by 

 this strange harnessing of power. 



Below: The 

 Second Largest 

 Searchlight in 

 California, Used 

 in Selling Real 

 Estate at Night. 



Propelled by Both a Marine and Aerial Propeller, This Canoe 



is Claimed to be Safer Than the Ordinary Craft of That 



Class and Far Speedier. 



Above: Switch- 

 board of the 

 Searchlight. 



"SELLING THE EARTH" AT NIGHT 



For years the brains of all the real es- 

 tate men of Southern California have 

 been busy in devising new ways and 

 means of "selling the earth." Every 

 method that has come up to improve 

 the appearance of a new tract and that 

 would tend to quicker selling has been 

 eagerly grasped and worked, and, it 

 might be said, "worked to a standstill." 

 But after everything is said it remained 

 for the Harry H. Culver Company, of 

 Los Angeles, to introduce the most 

 novel method yet employed. By this 

 company's method a large searchlight is 

 introduced into the real estate business. 

 It has a two-fold purpose and 

 effect. First, it attracts atten- 

 tion to the city, for its rays may 

 be seen for miles around ; sec- 

 ond, it permits the sale of real 

 estate by night, this probably 

 being its strongest feature. 

 There are hundreds of people 

 who are unable to visit Culver 

 City during the day and these 

 people are shown the land dur- 

 ing the dark hours. The light is 

 located upon the top of a three- 

 story building, and from this 

 point it is a simple matter to turn 

 its strong ray of light upon any 

 lot or section of lots in the entire 



