280 



THE INDIA RUBBER WORLD. 



| M w i, 1 910. 



CENTRIFUGAL COAGULATING PROCESS. 



THE problem long lias confronted the rubber producing in- 

 terest of preparing rubber from latex more speedily and 

 more economically than by the primitive processes still in vogue, 

 as a rule, in connection with forest rubber. Not only this, but 

 tiic desirability of supplying manufacturers with rubber in a 

 cleaner condition has been recognized. The success of the rub- 

 ber planters of the Far East has been due, to no small extent, 



"Empire" Centrifugal Rubber Collector. 



to their adoption of methods whereby the cost of preparation 

 has been reduced to a figure until recently considered impos- 

 sible, while the product contains practically no impurities. As 

 the rubber plantations in Mexico — of more recent origin than 

 those in Ceylon — arrive at a productive stage, the planters there 

 also are taking an interest in mechanical appliances for giving 

 to their product the best possible character. 



An apparatus which has been used successfully on one of the 



Rubber produced by the centrifugal collector in the sizes now 

 used is delivered somewhat in the form of Para biscuits, having 

 a circumference at base of 30 inches, height of <j inches, and a 

 weight of 19 pounds. These rubber biscuits, of course, line the 

 walls of the bowl in which they are formed, and have an open- 

 ing through the center. 



One of the accompanying illustrations shows the specimen 

 of this product sliced in half, a view of the two pieces being 

 given. When the rubber is thus cut in two it shows very 

 densely coagulated light colored surface, with a suggestion of 

 thin layers such as are produced by the smoking process, and 

 suggesting typical fine Para biscuits. A convenient method of 

 operating this machine is by means of small gasoline engines. 

 This centrifugal machine is offered for the treatment of Hevea 

 and other rubbers, as well as Castilloa. The manufacturers are 

 The Empire Cream Separator Co. (Bloomfield, New Jersey"). 



Rubber Produced by the Collector. 



largest Mexican plantations producing rubber, and which is illus- 

 trated on this page, is the Centrifugal Rubber Collector, which 

 may be described as being of the nature of the cream separator 

 used in dairies. This machine is referred to as collecting all 

 the rubber which may exist in the latex, but with a minimum of 

 resin. The operation of the machine is rapid, and the rubber 

 which comes from it is ready for market more promptly than 

 that produced by any other method from the latex of Castilloa. 



NEW TRADE PUBLICATIONS. 



TTIE Gutta-Percha and Rubber Manufacturing Co. of 

 * Toronto, Limited, issued under date of March 1 their cata- 

 logue of "Maltese Cross" rubbers for the ensuing season. As 

 usual this catalogue covers an extensive range of goods, and is 

 attractively and profusely illustrated. [3%" x 5 7 A". 72 pages.] 

 Also: Net Price List "Maltese Cross" goods. \zY% x 5%". 

 24 pages.] 



Firestone Tire and Rubber Co. (Akron, Ohio) send out a 

 booklet containing valuable suggestions to motorists on the cor- 

 rect air pressure for tires. [6" x 3 T /4". 16 pages.] 



E. J. Willis Co. (No. 8 Park Place, New York) send out an 

 extensive catalogue of Automobile Supplies — Catalogue A, 1910 — 

 illustrated with practically every type of automobile accessories 

 in the trade, including tires of the leading makes, and many 

 other articles in rubber. [jW x 9". 68 pages.] 



The Hartford Rubber Works Co. (Hartford, Connecticut), 

 in a tastefully got up booklet entitled "A Factory's Progress 

 and Product," devote space to a historical sketch of the works, 

 after which are illustrated and described not only their Clincher 

 and Dunlop automobile tires, with such special features as the 

 Midgley and Bailey treads, but also their solid rubber tires 

 and single tube bicycle tires, and a very full line of accessories 

 adapted to use in connection with these various products. The 

 catalogue is unusually well illustrated. [8%"xg". 28 pages.] 



Hood Rubber Co. (Boston), issued at the beginning of the 

 month their Catalogue and Net Prices to Retailers, showing 

 the regular and early order prices before June 1 of their "Hood" 

 and "Old Colony" brands of footwear, illustrating some new 

 features of interest. [3^"x6". 64 pages.] 



The North British Rubber Co., Limited (Edinburgh), issue, 

 under date of March, 1910, a new list of aeroplane and balloon 

 fabrics, it being their sixth edition. [8^4"xii'4". 8 pages. | 



W. D. Allen Manufacturing Co. (Chicago), issue their 

 Catalogue No. 26 devoted to the Brass Goods which they manu- 

 facture, including a line of hose accessories and lawn sprinklers. 

 Their product of packings is also included. [6}4"x9-K". II2 

 pages.] Their catalogue No. 27, styled "Architects' Edition," is 

 devoted mainly to fire hose equipment for interior use. [6J4" 

 xgM"- 32 pages.] 



B. F. Sturtevant Co. (Hyde Park, Massachusetts), include 

 in their latest installment of "Bulletins" Catalogue No. 170 — 

 "Sturtevant Vacuum Cleaner." This is a device for household 

 use, adapted to being operated by electricity from lighting 

 circuits. [6'/-"x9". 16 pages.] 



ALSO RECEIVED. 



The Standard Electric Time Co., Waterbury, Connecticut = Standard 

 Electric Time Systems. Catalogue No. 32, January, 1910. 72 pages. 



J. Ellwood Lee Co., Conshocken, Pennsylvania. ="Jelco" Automobile Tires 

 and Tubes. Paynter Anti Skid Tires. 4 pages. 



A. J. Reach Co., Philadelphia. = Baseball Catalogue, season 1910. 36 pages. 



