June 



1915. 



THE INDIA RUBBER WORLD 



515 



htha arc numbered. \s regards the importation 



al tar dyes from Germany, ^merii i i ol course ii 



same state as ourselves, and it will be i>t interest to - 1 ■ 



-.In' Follows tin' British lead on the smallei itated 



by lack ol sufficient raw material. Only < i»i i 1 1- small quanti- 

 ties of aniline or other coal t li - olors are used in our rubber 

 industry, the coloring of toy balloons being the principal 



applii ation. 



THE MARKE I Fl iR I III \IU M.S. 

 According to the price list given in the Vpril issue of The 

 India Rubber World the most interesting feature in America 

 i- tlu scarcity oi .'II coal tar products. This is by no n 



casi here, because our production of thi icals 



fron - tar and also coke oven tar has been much i 



completely developed. Our superiorit3 over all other coun- 

 ii. lii mr far greater output of gas tar, which contains 



a larger amount of benzol ami toluol than does thi German 

 tar, which is mainly derived from coke ovens, though 

 countries, as also America, extract considerable quantities ol 



i I i intaining some toluol from coke oven gases Bi 



.'i 90 per cent, i- now readiL obtainable at the price ol 10 d 

 per gallon, and solvent naphtha is at about ordinary figures 

 With regard to accelerators, the li-t is being rapidly added toby 

 rubber chemists, the latest additions to the patented list includ- 

 ing benzylidene-aniline, hydrobenzamide and naphthylenediamine. 

 The only chemical winch is really worrying the trade on tin- side 

 i- oxide of zinc, and the American product lias the chanci 

 life time i" i iir, i an entrance through doors hitherto closed to it. 

 Caustic soda, an article nowaday > oi more interest to the reclaimer 

 than to the manufacturer, has had a considerable advance in 

 land, though not so in America. The price on this side is 

 regulated by a convention, and many large user- buy soda 



ash ami causticise it themselves, a method in which so far 

 the reclaimers have not followed suit. 



A number of the leading British solid tire manufacturers have 

 decided to guarantee their tires in future only for a service of 

 10,000 -. within a period of 1-' mouth-. 



The Dunlop Rubber Co:, Limited, of Birmingham, paid on 

 May 1 an interim dividend on it- ordinary shares at the rate of 

 Hi per cent, per annum. This company ha recently completed 

 additions and improvements by which its capacity has been 

 greatly increased. 



lieutenant Gabriel Ravel commercial manager ol the Michelin 

 Tire ( o., "1 France, has been made Chevalier of the Legion ii 

 Honor in recognition of his gallant conduct in battle, where he 

 was seriously though not dangerously wounded. 



IMPERIAL INSTITUTE REPORT ON BRITISH GUIANA RUBBER. 



The report of the Imperial Institute, of London, on two sam- 

 ples of Hevea rubber from British Guiana, shown at the London 

 rubber exhibition and later forwarded to that institute for ex- 

 amination, states that the samples were quite satisfactory as 

 i.e. nds preparation, composition and physical properties and that 

 consignments of similar character would always be readilj sala- 

 ble at prices closely approximating those of line plantation Para 

 from the East. These samples, which were from the government 

 stations at fssororo and Onderneeming, wire valued commercially 

 at about 2s. 3d. and 2s. 2d., respectively, per pound, as compare. 1 

 with first quality biscuits at 2s. -id. to 2s. 4' _■</. per pound. 



Exports of balata from British Guiana from January 1 to 

 April 22 of the present year show an increase over those of 

 lite same period of 1914 from 27.1051 pounds to 4S1.100 

 Ik muds — 369,460 pounds of this quantity being shipped to the 

 United Kingdom and SI, 040 pounds to the United States. 

 Exports of rubber for the same period of 1915 amounted to 

 S25 pounds. 



WORKING FOR THE WAR SUFFERERS. 



A. Staini Manders and Miss I). Fulton are continuing 

 their activities in tin inscriptions for war suf- 



ferer- Incidentally, no e penses are charged agaii I nount 



cribed, which w urse, thai their work is not only 



voluntary but absolutely without remuneration. They are now 

 ing in the organization of a benefit for the work of the 

 Red Cross of the allied armies. To raise money for this a fete 

 given at Calais, where thousands of poor people are 

 being nd sheltered. Miss Fulton and Mr. Mac 



at the request of the Mayor of Calais, are securing subscriptions 

 i , cell in work. This request, by the way, came through 

 Captaii ml Leon ( >sterrieth ran, whom visi- 



tors to the l.i i rubbei exhibition will remember. The necessity 



i.l i iir and immediate help, is apparent, and Mr. 



Mandei urgi all ivhi are interested to end subscriptions, no 

 matter how -mall. 



SOLID RUBBER TIRLS IN THE WAR. 



Ilu impi le motor transport and solid rubber tires 

 .in pi. i, in., m tin- pre-ent war is no secret, hut it is perhaps not 

 rally known that the conditions under which these tires are 

 giving service in the European war /one are quite new and such 

 i- built to encounter. The famous "paves" or 

 granite block highways of Northern France, were always a terror 

 lltomobilists, but under war conditions these miles of hump- 

 ing causeways have been made even more impossible. Solid 

 tires are loin at their bases and wrenched from 

 their rims long 1» fore the mad is worn, and 4.000 miles appears 

 to be about the limn of their service capacity. Over cobble- 

 stone pavements, followed for hundreds of miles, day in and 

 day out, lire- of considerable resiliency an- required, attached 

 to rims by a wry wide basi In most -olid tires there is 

 not sufficient graduation between the resilient part of the tire 

 and the hard vulcanite base which adheres to the steel band on 

 which the lire i- built. The transition is too abrupt, and the 

 consequen i i thai on road- naturally very rough and further 

 torn to pieces by shi 11 fire and excessive traffic, these tires are 

 torn from their steel hands in a comparatively short time. The 

 ideal tire for service, under such conditions as now exist in 

 the war /one in Northern France, should be wide at its base, 

 and the resilient tread should harden gradually as it approaches 

 the hard ring where tin tire i- vulcanized to its steel retainer. 

 No doiihl the constant hammering to which solid tires are sub- 

 jected on t , , the rubber to crystallize and be- 

 come brittle at the point where it i- made hardest in the course 

 of manufai 



BRITISH RUBBER MANUFACTURERS ADVANCE PRICES. 

 Three of the large British rubber manufacturing compa- 

 nies — the North British Rubber Co.. Limited, of Castle Mills. 

 Edinburgh; the Dunlop Rubber Co., Limited, of Birmingham. 

 and the Waverly Rubber Co., Limited, of Edinburgh — have 

 announced an advance of 1(1 per cent, in prices, due to in- 

 crease in working expenses and in the cost of materials en- 

 tering into thi isition of their product. In the case 



of the first-named company the advance applies to belting, 

 -hici rubber, packing and mechanical rubber goods. 

 The Dunlop advance applies to rubber tires and their ac- 

 cessorii -. and the Waverly advance to hoots, shoes and water- 

 proof clothing, etc. 



Of the imports of crude rubber and gutta pcrcha into Russia 

 in 1913— which amounted to $20,680,487— $3,066,035 of this total 

 was received from the United States. Exports of manufactured 

 rubber goods from Russia to the United States for the year 

 ending June 30, 1913. amounted to $35,270, and similar exports of 

 rubber scrap for the same period were valued at $641,002. 



