370 



THE INDIA RUBBER WORLD 



Febriarv 1, 1921 



stocks of crude rubber on the market and the high cost of pre- 

 paring the synthetic article in connection with the shortage of 

 coal make competition with the natural product impossible for 

 the present. 



The Piraunschweiger Gummiwareniabrik kicliard llayeniann, 

 Braunschweig, has been dissolved. Tlic owner. Richard llage- 

 mann, has takeit over for his business. Brunonia-tinmmiwerkc 

 Richard Hagemann. 



The Treibreimenfabrik Woide G. m. b. H.. Breslaii. manufac- 

 turer of belting, has been dissolved and the owners have begun a 

 new business known as the Hreslauer Treibricmenfabrik VVoidc 

 & Dicl>ison, at Breslau. 



The lirni of .August Knab, wholesale house for rubl>er bed sheet- 

 ing and oilcloth, has moved from Niirnberg. where it was 

 founded in 188S, to Bad Reichei-.ball. The new tiusiness lias 

 been greatly extended. 



The Hamburger Gummi-\'crtriebs (iesellscliaft m. b. 11., Ham- 

 burg, has been dissolved. 



II. Schwieder Sachs, Gumnii-iuul (iutta-perchawarenfabrik, 

 Dresden, has raised its capital by 3,500,000 marks. This is the 

 Dresden branch of the .Akt. Gcs. Vercimgtc Berlin-Frankfurter 

 Gummiwarcn l-'a'nriken, Berlin, \.hich is also the owner of the 

 first concern. 



\V. (;oy & Co.. llanihner-Liiulcn. Iiandle the sales fur the Mit- 

 (elland-Gunimiwerke \. G.. t(irnnT)y H;uin(i\erscbc Akticii- 

 • iumniiwarcn-Fabrik. 



NEW FIRMS 



Gescllschafi der ccbten .\lark>-l'rothesen, A. \. Marks m. \>. 

 H., has been founded at Frankfort-dn-the-Main. The aim of 



W'einheimer Gnmmi-und Gutta-perchawaren-Fabrik, Weisbrod 

 lit Seifert, m, I). H., Wcinheim. .Manufacture and sale of rubber 

 and gutta percha goods. 



Duerener Draht-und Kabclindusirie, Diieren. Sale of wires 

 and cables. 



Gummi-Handelsgcsellschaft, Ferdinand Bauwens, m. b. H., 

 l-rankfort-on-the-Main. Wholesalers in tires, repair material, 

 rubber solution, necessities for vulcanizing. 



GERMANY'S LARGEST RUBBER WORKS 



L>iie of the largest rubber manufacturing companies in the 

 wcirld is the Continental Caoutchouc & Gutta Percha Co., Han- 

 over, Germany, whicli is shown in the accompanying illustration. 

 Starting in 1872 with 200 men and a very modest capital, it has 

 grown to be the largest concern of its kind in Germany. Its 

 products are varied, embracing almost everything made of rubber 

 e.xcept footwear. The attention of the firm is directed chiefly 

 to the manufacture of soft rubber goods, and for the most part 

 for technical purposes, that is, hose, belting, packing, etc., also 

 rubber cloth, balloons, toys, balls and tires for bicycles and auto- 

 mobiles. Its "Continenlal" pnonmatic tires have been famous in 

 Europe for many years. 



The Continental Caoutcliouc & Gutta Percha Co. is cosino- 

 Dolitan in its business transactions, doing business all over the 

 world, being, in this particular, the greatest German firm in this 

 special branch. 



The late .Adolf Priiizhorn. who was well known and admired 

 in the United States and England, was for thirty years managing 

 director of the "Continental," resigning from active service in 



Plant of the Continental Caoutchouc & Gutta Percha Co., Hanover, Germany 



this enter])rise i^ the manufacture nf original Marks prosthesen 

 or artificial limbs, with genuine Marks feet. The company, which 

 recently patented designs for rubber feet, has also taken over the 

 orthopedic department of the .Antiplanwerke .\lfred Stiefel. 

 The head of the new concern, which is capitalized at .^,000,000 

 marks, is Alfred Stiefel. 



F'irma J. briedricb Eckrich, Karlsrulie. Wholesale (U:iler in 

 rubber goods. 



Bayerisclie Gnmmi-und .-Xsbestiiuhistrie. Hans Maier, Munich, 



Ri-Pneu-Nagelsicher Gummiwerke, G. m. li. II., Karlsruhe. 

 Bicycle tire covers. 



Prussig Gummi-Industrie Ricmann & Co., K(inigsl)€rg, Preiisseii. 



Kalielwcrk Niirnberg .-Vktiengesellschaft, Niirnberg. Capital, 

 18,000,000 marks. Directors, Gustav Wunderlich and Max 

 Kriininger. 



Fettwcis & Freitag. Diisseldorf. Manufacture of rublnT goods. 



Maerkisch (jummiwaren-Fabrik G. m. b. H., Berlin. Manufac- 

 ture of rubber goods. 



Hannoversche Gummiwerke "Excelsior," .Akt. Ges., llannovcr- 

 Limnier. Tu manufacture and trade in sporting goods of all 

 kinds. 



Selhausen & Co., Duisburg, wliolesalers in rubber heels. 

 Deutsche Gummiwaren-Vertriebs-Gesellschaft m. li. II.. i'r.ink- 

 fnrt-on-the-Main, wholesalers in all kinds of ruliber goods. 



1909. However, be continued to give the firm the benefit of his 

 experience as a member of the committee of inspection. 



The illustration shows a late jiicturc of the factories, with the 

 new administration building in the center front. 



VULCANIZATION AND DEPOLYMERIZATION 



The improvement of rubber by hot vulcanization is stated by 

 E. Seidle in Gummi-Zcitung, 1920, 34, 797-798, to be accompanied 

 by a les^ marked opposite effect of depolymerization which is 

 concealed by the vulcanizing efTecl. Rise in temperature increases 

 the rate of vulcanization more than that of depolymerization, 

 consequently vulcanization at higher temperature to the same 

 percentage of combined sulphur r latively increases the beneficial 

 effect. 



FOREIGN TARIFFS 



SWITZERLAND 



.-V decree issued by the .Swiss Icdcral Department of Public 

 Economy dated November 10, and in force froin December 1, 

 1920, provides that the following goods may not be exported from 

 Switzerland, '■xcept under special license issued by that depart- 

 iTient : india rubber and gutta percha without internal layers of 

 tissue or metal, blocks, Iialls and negrohead (raw caoutchouc), 

 so-called "patentplattcn" not vulcanized ; waste of india rubber 

 and gutta percha: rnblicr tires (inner tubes and covers') for 



