May 1, 1912.] 



THE INDIA RUBBER WORLD 



401 



New Rubber Goods in the Market. 



Ingento Daylight Bag. 



KUBBEK DAYLIGHT BAGS IN PHOTOGRAPHY. 



AN excellent contrivance for the photographer when desirous 

 of changing plates to a developing tank or loading plates in 

 a holder in the daytime, is a rubber bag made for the pur- 

 pose. The bags come in sizes to fit cameras from 4 x 5 to 8 x 10. 



The plates, or whatever 

 needs changing, are 

 put into the bag, the 

 opening being closed 

 with glove fasteners. 

 The heads are then in- 

 serted through side 

 pockets or sleeves of 

 the bag, which are safe- 

 guarded by elastic 

 bands and the desired 

 change of plates is 

 made. These bags are 

 made of the finest quality of black sateen, lined throughout with 

 black rubber. [Burke & James, Inc., Chicago, Illinois.] 



PNEIIMATIC CRIB MATTRESS. 



The illustrations show one of the new pneumatic crib mat- 

 tresses, both inflated and deflated. When inflated it is soft, com- 

 fortable, never becomes matted, nor 

 does it need turning. It can easily be 

 cleaned with a sponge, does not wet 

 through ; and when it is wet, dries al- 

 most immediately. It is absolutely hy- 

 gienic, as no germs can possibly get a 

 place to hide in it. The mattress can 

 be adjusted as to softness at any time 

 very easily. When deflated and wrapped 

 Crib M.^ttress up it weighs only seven pounds. It 

 (Deflated). can he had in two sizes, or made t'^ i^r- 



^^^^ 



a^2?s 



. -TIC Crib .M ^,,.. , .^..^..ili^;. 



der in any special size. [Pneumatic Manufacturing Co., Brook- 

 lyn, New York.] 



A KUBBEK WITH A LEATHER HEEL SEAT. 



Rubbers have to stand a good deal of hard wear at the best ; 

 and when they get it both ways, outside and inside, full service 



can hardly be expected. And they 

 are bound to get it both ways 

 when the leather shoe which goes 

 into the rubber has projecting 

 nails in the heel. To guard 

 against this contingency the Converse Rubber 

 Shoe Co. puts a leather seat in the heel of a 

 number of its most popular shoes, sandals and 

 "self-actings" for men, and croquets and 

 storm rubbers for women. Where this piece 

 of leather is put in the heel of the rubber, it 

 is a matter of no particular consequence 

 whether the leather heel has any exposed nail 

 heads or not. The illustration shows the po- 

 sition of this leather seat. [Converse Rubber 

 Shoe Co., Maiden, Massachusetts.] 



A DEVICE FOR DETECTING ELECTRICAL CURRENTS. 



Accidental electrocution is by no means a rare occurrence. 

 Scores of workmen have had their lives snuffed out because they 

 started to work upon wires or apparatus from which they sup- 

 posed the electrical current had been shut off when it had not. 

 The former methods of determining whether the wire or ap- 

 paratus was "live" or "dead" were most uncertain, as they de- 

 pended upon the perfect working of switch boards and upon the 

 unfailing care of workmen, who are sometimes unreliable through 

 carelessness and sometimes through inexperience. 



A little apparatus has been devised— extremely simple in char- 

 acter, but accurate — by which the presence of any voltage above 

 500, either direct or alternating, can always be detected. This 



Electroscope. 



device consists of a delicate silver leaf mounted upon a copper 

 terminal, which is hermetically sealed within a glass tube. The 

 metal cap of this tube forms the test terminal which is advanced 

 toward the conductor or apparatus. The glass of the tube af- 

 fords protection for the operator. The silver leaf will stand 

 perpendicular to the terminal when in an electrical field, and will 

 lie in its normal position if there is no potential present. This 

 electroscope is made in two sizes — one as shown in the cut for 

 pocket use, which the workman can conveniently carry with him, 

 and the other a considerably larger size with wooden handle, for 

 use in power houses and electrical stations. 



THE TTRIAN "HOLD-TITE" ANTI-SKID TIRE. 



A glance at the accompanying illustration of the Tyrian tire 

 shows how the anti-skid qualities are obtained. There are two 

 evenly moulded channels running around the whole tire, which 

 permit the shoulder in the center to 

 take hold of the roadway. In addition 

 to that there is a large number of cross 

 channels, about an inch apart, which 

 make it easy in starting for the tire to 

 grip the road. Every autoist wants to 

 avoid chains wherever it is possible. 

 Under the best conditions they are an 

 annoyance. The manufacturers of 

 this tire claim that it takes hold of 

 the road even under conditions of snow 

 and ice just as well as a chain can do. 

 These tires are made of the best Sea 

 Island cotton and Upriver Fine Para 

 and have behind them the company's 

 56 years of experience in the manu- 

 facture of high grade rubber goods. [Tyer Rubber Co., 

 Andover, Massachusetts.] 



Leather 

 Heel Seat. 



The accepted authority on South American rubber- 

 Rubber Country of the Amazon," by Henry C. Pearson. 



"The 



