August i, 1902.] 



THE INDIA RUBJ3ER WORLD 



341 



THE PROPER EXTRACTION OF LATEX. 



Published on the 1st of each Month by 



THE INDIA RUBBER PUBLISHING CO. 



No. 150 NASSAU ST., NEW YORK. 



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COPYRIGHT, 1902, BY 



THE INDIA RUBBER PUBLISHING CO. 



Entered at New York Post Office as mail matter of the second-class. 



TABLE OF CONTENTS. 



Editorial : page. 



1 he Proper Extraction o£ X/«(cx 341 



Rubber Goods throwing Better 341 



Governments and Cable Making 342 



Regulation of the Trusts 342 



The Coming World's Fair at St. Louis 343 



Giving It a Name 343 



Minor Editorial 344 



Working " Para Rubber " in the Amazon Valley 345 



[A Page ol Illustralions.J 



The India-Rubber Trade in Great Britain 



...Our liegnlnr Cnrrcspnndcnt 346 



[State of Trade. A Middleman's Dilemma. A Deficiency in our Manu- 

 facture. Cable Company Notes. Precipitated Sulphur. Artificial 

 Rubber. Sundry Notes.] 



The Latex Bearing Ducts of the Rubber Tree Henri LccmUe 348 



[With Illustrations.] 



Rubber Factory Equipment and Processes 350 



[The Cutting of Rubber Coated Fabrics Three Roll Washers and 

 Grinders. Vulcanizing Rubber Shoes Under Pressure. Miniature 

 \'acuum Drying Chambers for the Laboratory. With Si.\ Illustra- 

 tions.] 



Crude Rubber and Planting Interests 352 



[Castr/Ua Elastica Rubber Dried in the Sun. Rubber in the Malay 

 States. Rubber at the Trinidad Botanic Garden. Rubber E.xploiting 

 in Peru. Planting Manii;oba Rubber in Sergipe. New York Trad- 

 ing and Development Co. Other Mexican Rubber Planting Com- 

 panies. Methods of Rubber Planting.] 



Rubber Industry in the [United States) Census 354 



New Goods and Specialties in Rubber (.lllustrnted) 355 



[Stoughton Golf Ball. A Popular Toy The " Comfort " Heel Cush- 

 ion. A New Bed Sore Cushion. Rubber Carriage Sponges. "Uni- 

 versal" Blue Print Wringer. The "Simplex" Hygienic Nipple. 

 " The Little Minister." The Silk Rubber Sun Bonnet ] 



The Editor's Book Table 356 



Recent Rubber Patents [American and English] 357 



The United States Pacific Cable 359 



[With Portrait of John W. M.ickay.l 



Midsummer Outing of The New England Rubber Club 360 



(With Five Illustrations.] 



Affairs in the Amazon Rubber Country 362 



Letters to the Editor 363 



[ ■ German Prices of Rubber Scrap." The Colonial Rubber Co, 

 (Europe.) Rubber Egg Shells a Joke.] 



Some 'Wants of The Rubber Trade 364 



New Trade Publications 364 



India Rubber Goods in Commerce 365 



Miscellaneous: 



The ' • Pacific Rubber Co." Gets Tired 348 



The Ambition of Mr. Converse 354 



" Dermatine" and Its Uses 3fi4 



The Oblsro Rubber Plantation 670 



Rubber Notes from Europe 365 



News of The American Rubber Trade , 366 



[With Portrait of Ernest E. Bucklelon.] 



The Rubber Trade at Akron Uur Resident Oirrespondint 369 



Review of the Crude Rubber Market 370 



A PROPOS of planting rubber, it goes without saying 

 ■^*- that vigorous growth of the trees is essential and an 

 abundance of /afe.v desirable. But these conditions might 

 e.xist without profit to the owner. The great essential is 

 that the /<//ir.v be extracted without injury to the trees, at 

 an economical cost, and be converted properly into rubber. 

 It is by no means certain, if all the rubber trees now under 

 cultivation should suddenly reach a productive stage, that 

 the planters would be prepared to deal with the chief prob- 

 lem involved. Perhaps all the time that must elapse before 

 the maturity of the recently formed plantations will not be 

 too long for the study of the physiology of the rubber 

 yielding species, and particularly in relation to the /aUx 

 ducts and the conditions most favorable for emptying these. 

 ( )n another page appears an interesting contribution to 

 this study, by an eminent French botanist, M. Lecomte. 

 One feature of this paper to which special attention may 

 be directed is the suggestion that indiscriminate or reck- 

 less scarring of the trees, in order to obtain a present yield, 

 is liable to break the connection between the /aUx ducts — 

 not very close at best — and thus interfere with any future 

 yield. Not much argument will be needed to impress this 

 idea upon the mind of one who knows anything about 

 rubber trees, but what method can be adopted that will 

 minimize the unavoidable wounding of the bark in the 

 extraction of rubber, say from such species as the Castilloa 

 elastica ? 



RUBBER GOODS GROWING BETTER. 



T^HE fact that rubber manufacturers use a variety of 

 *• compounding ingredients in the production of their 

 merchandise is now pretty generally known by the public 

 at large. It is also universally misunderstood, the general 

 belief being that compounding is nothing more or less than 

 cheapening. Even those who are large buyers and are in 

 close touch with the trade, who visit the factories and have 

 ample opportunity for investigation, are prone to the same 

 sort of error. For example, a well known builder of au- 

 tomobiles, holding forth before an interested audience at 

 an " auto " club not long since, stated that the average 

 tire contained not more than lo per cent, of rubber with 

 90 per cent, of fabric and " mud." Certain of the listen- 

 ers thought the statement extreme, but none appreciated 

 the fact that the automobile tire would be built wholly of 

 pure rubber to-day if it would wear better ; that the 

 efforts of the manufacturers are not directed toward 

 cheapening, but toward durability and elasticity. 



That intelligent compounding is in the interest of the 

 user is proved by the exhaustive tests that prominent elec- 

 tricians have made of all types of insulated wire, where it 

 was proved over and over again that compounded stocks 

 were far superior to pure rubber, lasting longer and insul- 

 ating better. The same is true regarding belting, packing, 

 hose; indeed, all but the soft rubber goods, that demand a 

 high degree of elasticity, and that alone. 



When the science of compounding was in its infancy 



