October i, 1908.] 



THE INDIA RUBBER WORLD 



41 



• 4. 

 IS. 

 16. 

 ■ 7. 

 18. 

 19. 

 20. 



Manihot dicholoma. Southern Brazil. "Jequii" rubter. 



Manihot Glazioi-ii, Southern Brazil. "Ceora" rubbt-r. 



Safium Jenmani. British Guiana. "Touckpong" rubber. 



Sapium verum. Colombia. "Virgin" rubber. 



Sapium utile. Ecuador, Peru. 



Ficus clastica. Indo-Malaja. "Rambong" rubber. 



Castilloa elastica. Western tropical America. The standard native 

 rubber of Mexico and Central America. 



In addition, the Kew authorities exhibited photographs of young 

 Castilloa and Hevea, and a group of young living plants of 

 He^'ca Brajiliensis. 



The Kew exhibit formed part of the Loan Section, which in- 

 cluded several other items of interest, including young rubber 

 trees grown in London hot houses, photographs representing the 

 growth of rubber trees at various stages, and a series of pictures 

 lent by Francis J. Holloway, of Ceylon, showing different sys- 

 tems of tapping and factory (plantation) work in rubber. 



RUBBER PLANTATION REQtnSITES. 



Francis Shaw & Co., Bradford, Manchester (exhibit No. 16), 

 exhibited: (i) Washing and crepeing rnachines for preparing 

 rubber on plantations ; (2) Scott vacuum stove for drying rubber 

 on plantations; (3) hydraulic rubber blocking press and hand 

 pumps ; (4) hydraulic sheeting press. 



David Bridge & Co., Castleton, Manchester (exhibit No. 18), 

 showed an electrically driven washing and sheeting machine work- 

 ing on raw rubber, the machine being connected with their im- 

 proved patent friction clutches. The next process involved their 

 improved vaccum dryer, also shown. Another machine was 

 Bridge's patent rubber hydraulic block press. The exhibit em- 

 braced also the Da Costa appliance for the coagulation of the 

 latex in bulk, by means of the infusion of steam and smoke. 



Exhibit No. 22 was devoted to the Emil Passburg system of 

 vacuum dryers as applied to rubber plantations, and also rubber 

 goods factories, this being in charge of their London agency. 



J. Robinson & Co., Salford, Manchester (exhibit No. 33).— 

 Belt-driven washing mills for plantation use, with roller for 

 macerating crepe and sheet rubber. 



Alexander David Callander, Neboda, Ceylon (exhibit No. 52), 

 showed an instrument for grooving and tapping rubber trees, 

 the knife making the incision and carrying off the skin of the 

 tree at a single stroke. 



Robert Warner & Co., Limited, London (exhibit No. 91), 

 manufacturers of rubber plantation machinery showed: (i) 

 Macerating or crepe machines; (2) sheeting machine, with patent 

 hot rollers; (3) horizontal direct acting steam pump; and (4) 

 the "Walton" patent seatless stop valve. 



No. 96. G. van den Kerckhove, Brussels.— "V.D.K." rubber 

 tapping knife ; "Fumero V.D.K." apparatus for smoking latex by 

 the Para system, in two forms. 



No. 32. Charles Clark & Co., agents, London. — Vermorcl's 

 Ruapsach sprayer. 



No. 100. The Bowman-Nortlnvay patent knives for tapping 

 rubber were exhibited by Harold F. Blyth, of Stockton, the Eng- 

 lish agent. 



No. 24. Walker, Sons & Co., Limited, London and Colombo. — 

 Rubber estate requisites and tea and coffee machinery; rubber 

 tapping knives with which practical demonstrations were given. 



No. 56. "Venesta," Limited, London. — "Venesta" cases for pack- 

 ing rubber and rubber goods. 



No. 138. Kalisyndicat G. m. b. H., London agency. — Crude 

 and manufactured potash salts, and a collection of tropical plants 

 and products, representative of growth by manuring with differ- 

 ent combinations of fertilizers. 



"Purub" is a process protected by patents for effecting speedily 

 the perfect separation of caoutchouc from the latex without the 

 use of apparatus, fumigating, or boiling. This appeared in ex- 

 hibit No. 19. 



No. 61 A. Tangyes, Limited, Birmingham. — Gas and oil en- 

 gines, pumps, and the like. 



No. 61 B. Fleming, Birkby & Goodall, Limited, London. — 

 "Teon" vulcanized textile belting, treated with cement under a 

 secret process, waterproof and designed for hot climates. 



No. 61 c. Bergtheil & Young, London. — "Bandy" electric 

 punkahs. 



[lluttenbach Brothers & Co., Penang and Singapore, are agents 

 in the East for the three firms last named above.] 



No. 23. The Pracd Patent Safety Gas Light Co., Limited, Lon- 

 don. — An economical, non-explosive, and non-poisonous gas — 

 from petrol, gas and air — for heating and lighting. 



No. 27. Trewhella Brothers, Trentham, Victoria. — Log and 

 stump jacks. 



SCIENTIFIC APPARATUS. 



Louis ScHorPER, Leipzig, Germany (exhibit No. 29), showed 

 no fewer than 11 machines for testing the elasticity and other 

 qualities of rubber, for cutting and gaging the thickness of ma- 

 terials, for ascertaining the number of threads in woven ma- 

 terial, determining the earthy ingredients of rubber, and so on. 



The collective exhibition of a laboratory for scientific and 

 technical india-rubber researches under the direction of co- 

 exhibitors (exhibit No. 36) was under the auspices of Dr. Eduard 

 Marckwald and Dr. Fritz Frank, of Berlin. The laboratory in- 

 stallations, instruments, and apparatus were supplied by Paul 

 Altmann, Berlin ; optic instruments, Ernest Leitz, Wetzlar ; elec- 

 trical measuring apparatus, Gans & Goldschmidt, Berlin ; india- 

 rubber roller, Joseph Robinson & Co., Manchester ; stoneware, 

 gas, and water fittings. The space was divided into special work- 

 ing rooms and provided with the most important implements 

 for technical and scientific work, the whole being comprised in 

 three compartments: (i) The physical laboratory; (2) manu- 

 factory space; and (3) chemical laboratory, the whole containing 

 nearly a hundred different items of apparatus. 



The exhibit of the India-Rubber Journal (No. 90) contained a 

 collection of apparatus for testing rubber, lent by Mr. Wright, 

 the editor, and Dr. R. Schidrowitz, of Germany, this being 

 divided into (1) physical apparatus and (2) chemical apparatus 



Exhibit of Guayui.e RubBER. 



[Made by F.d. Maurer, of New Yiirk, reiiiesentative of important gii.'iyule 

 rubber producing companies in Mexico.] 



