September 1, 1915.] 



THE INDIA RUBBER WORLD 



655 



A NEW TYPE OF WATERPROOF SHOE. 



Tlie "Dry-Sox" is a new line of shoes in which the w 

 proof effect is produced in a novel manner. The illustration 

 shows the part thai rubber plays in its make-up, a rubber 

 welt being sewed in with the leather welt to prevenl water 



from getting between the welt and the out-sole. Ibis, the 

 manufacturers claim, makes as waterproof a leather shoe as 

 it is possible to produce. [ 1\ Mayer Moot & Shoe < o„ Mil- 

 u aukee, \\ isi i msin. | 



A RUBBER DENTAL BLOCK. 



The best filing surface in dressing 



a vulcanite denture is a 

 cushii hi oi soft rubl" i . 

 and the cut herewith 

 shows an imptoved 

 dental block which 

 ci insist s of a cast-iron 

 frame and a rubber 



bli i. k that lias just the 

 slight give whi. 



mits .-.i easy ami ac- 

 ' ui n i filing. 'Ibe 

 i UN" r blocks, 

 ,ii e made in tw i > 

 to nt different 



3, are readily re- 

 placed when worn 

 out. [The S. S. White 

 Dental Manufacturing 

 Co., Philadelphia.] 



STEP PLATE WITH RUBBER STRIPS. 



The Stanwood Safetj Step Plate is a new device composed 

 seller of semi-pliable rubber segments inserted i 

 embossed metal plate covered with a baked-on enamel in 

 imitation oi gray rubber. The rubber segments project one- 



eighth of an inch above the perforated containing plate and 

 can be replaced in the event of damage or when worn. The 

 step, besides insuring a firm foothold, prevents the tracking 

 of mud and water into the car. [.Automatic Appliance I rj 

 Boston.] 



THE MOTORCYCLE TIRE WITH THE BLUE STREAK 



\~ the motorcycle is b< tructed for a wider range of 



illness than in the past, then is naturally a call for better 

 tires, and the "Blue Streak" tiri with .■ distinguishing blue 



i ii i le around the center, has 

 been prodtii ed to mei i this 

 demand. I be bli « ks on tb. 

 me up far- 

 ili. i mi tlu side, -i' 

 traction and wear, and 

 SS has four plii 



i a breaker strip — 

 all) placing it in the 



.inn inn ibile In i' J.e 



heavy tread blocks not onlj 

 make the tire attractive but 



50 mi, I'lai to 



permil i flat and regul i tread and on rough roads serve as a 

 protection against cuts and punctures. [The Goodyear Tire & 



Kuliln r i ii . Akron, < >hio.] 



RUBBER IN THE ■AEROPHONE." 



The rush of the wind and the deafening roar of the propeller 

 discourage conversation between the pilot and the passenger in 

 an aeroplane, and a special telephoni equipment is required to 



maki 



possible. This apparatus 

 is called an "Aero-pl 

 and consists of 

 double-head telephoi ■ 

 ■ s and tv 

 of chest transmit- 

 ti ■ The receivers, which 

 an of hard rubber, are 

 held against thi i 

 a Spring head bam 

 thai practically all the 

 distui bing noises are ex- 

 cluded. The special 

 transmitters are provided 

 w ith soft rubber caps and 

 trapped ti i the chest 

 at a point below the col- 

 lar-bone and abovi 

 third rib. In speaking. 

 last muscles trans- 

 mit the voice vibrations 

 to the transmitter. 



The receivers a n d 

 ; s are con- 

 nected by suitable cords 

 which terminate in a small plug, the plug being inserted in a 

 jack mounted in the frame-work of the aeroplane. One of these 

 jacks is providei h occupant. The battery required con- 



■ l three standard telephone dry batteries, which will pro- 

 vide continuous service for 100 hours. 



The simplicity and efficiency of ibis apparatus especiallj 

 adapt it to use in the military branch of aerial work, where it 

 sential that aviator and passenger be in communication at 

 all limes. [Western Electric Co., Xew York.] 



A NEW USE FOR THE RUBBER BAND 

 An inexpensive card case for the vest pocket is made effective 

 for holding a dozen or fifteen cards by means of a simple flat 

 rubber band. One cover is lined with cardboard folded to 

 fit the back of the covers and returning as a narrow flap to bear 

 upon the cards, the power to hold which is obtained by an en- 

 circling rubber band. 



