October 1, 1913.] 



THE INDIA RUBBER WORLD 



33 



THE ADVANTAGES OF BALATA BELTING. 



The "Goodyear — A Family Newspaper," published by The 

 Goodyear Tire and Rubber Co. of Akron, Ohio, contains a 

 variety of articles on different phases of the manufacture of 

 tires and mechanical rubber goods, written by the foremen of 

 its different departments. This insures correct technical knowl- 

 edge on the part of the writers. In a recent issue there is an 

 article on balata belting by R. D. Burr, manager of the mechan- 

 ical goods department of the company's Chicago branch, in which 

 the following interesting paragraphs appear : 



"In .\merica, balata belt in realty is as yet but little known 

 and Httle used, compared with either leather or rubber belts. 

 Its construction makes it particularly adapted for transmission 

 purposes, where the following conditions must be considered : 

 1st — High speed — small pulleys ; 2nd — Heavy and uneven loads, 

 suddenly applied and taken off; 3rd — Damp, wet conditions; 

 4th — Use of idlers; 5th — Minimum stretch. 



"With these conditions in mind, on account of the extreme 

 flexibility, great tensile strength, and the fact that the belt has 

 a frictioncd surface, insuring perfect pulley contact, we can 

 recommend it for service over high-speed small pulleys. 



"Equipment of this nature is found in saw and planing mills, 

 paper mills and cement plants. In saw mills, one of the hardest 

 machines with which the belt manufacturer must contend, is 

 the edger. Belts required on this machine are usually from 35 

 to 50 feet in length and from 12 to 20 inches in width. The 

 machine operating at a very high speed, ranges from five to 

 seven thousand feet per minute, with pulleys of too small a 

 diameter. 



"In planing mills, there are the planers and sizers, both of 

 which are operated at high speed over small pulleys and with 

 heavy loads. On this machine, especially, the pulleys supplied 

 are seldom large enough. This makes a belt of a sufficient num- 

 ber of plies to insure withstanding the strain of the load neces- 

 sary. In the use of rubber belts, ply separation is the general 

 complaint made by the user. When using this belting the 

 number of plies must be sufficient to carry the load. With 

 balata belting of a heavy, closely woven fabric, it is possible 

 to use a belt of a less number of plies and still obtain at least 

 the same results or probably better." 



KOEBIG PACKINGS. 



With such an essential mechanical requisite as steam packings, 

 the user requires to be assured of the quality. In his recently 

 issued catalog, P. W. Koebig tells the story of his various 

 grades, commencing with the well-known "H P" or "Koebig" 

 High Pressure Packing, intended for pressures exceeding 100 

 pounds. 



The catalogue further describes and illustrates this maker's^ 

 ■"Comal" square fla.x packing, and likewise his combination 

 grades. Sheet packings arc shown in various forms, while a 

 full collection of valves and gaskets supplements the assortment. 

 Full lists follow of steam and water hose, as well as of molded 

 rubber factory sundries. In a paragraph on quality this statement 

 appears : "If there were better packings I would sell them." 

 To those interested Mr. Koebig offers the facility of catalogs 

 in Spanish and Portuguese. [P. W. Koebig. 116 Broad street. 

 New York.] 



SIMPLEX STEAM SPECIALTIES. 



"The Blow-off" is the title of a periodical booklet, now in its 

 second year, distributed by the Yarnall-Waring Co., Philadelphia, 

 Pa., in the interest of its specialties. The Simplex Seatless 

 Blow-off Valve, "Lea" V Notch Recording Meter, Simplex Pipe 

 Joint Clamp and Simplex-Caskey Hydraulic Valves, are the spe- 

 cialties to which it is particularly devoted, and descriptions and 

 illustrations of which, with other interesting matter, make up the 

 contents of its 16 attractive pages. 



THE EDITOR'S BOOK TABLE 



KUBItER PRODUCING COMPANIES, 1913. EDITED BY MR. B. 

 Hyde Pfarson. The Mincing Lane Tea and Rubber Share Brokers' 

 .•\ssociatioii, London. Board covers, 8vo, 512 pp. Price 3 shillings. 



THIS is a well-printed volume containing particulars in regard 

 to the capital, securities, properties, production, prices ob- 

 tained, etc., list of officers and directors, dividends paid, office, 

 telegraph and telephone address, etc., of some 530 companies, 

 having an issued capital of £52,477,000. The value of this publica- 

 tion consists in the accuracy as well as the completeness of the 

 information it furnishes. Whenever possible the particulars have 

 been obtained directly from the companies and are the latest 

 available, while as addenda arc lists of secretaries and directors. 

 The companies other than those in the Far East are separately 

 classified. 



For those interested in rubber companies, either as investors 

 or in any other respect, and as a review of the rubber producing 

 interests of the world, the book is a valuable work of reference, 

 while its excellent arrangement and typographical execution make 

 its consultation a pleasure. 



MOZAMBIQUE: ITS AGRICULTURAL DEVELOPMENT. R. N. 

 Lyne, F.L.S., F.R.G.S., Late Director of Agriculture, Province of 

 Mozanibi(iue. London: T. Fisher Unwin. [Cloth; 350 pp., with index, 

 map and 16 illustrations.] 



In his official position as Director of Agriculture of Mo- 

 zambique, and with the experience obtained as incumbent of 

 similar offices in Ceylon and in Zanzibar, the author has been able 

 to present a remarkable picture of the importance to Mozambique 

 of its agricultural interests. Treating at length of its natural 

 advantages, he devotes separate chapters to each of its most 

 important products, including rubber, both wild and cultivated. 



Ceara rubber {Manihot Glasioz-ii) is the variety found best 

 adapted to prevailing conditions in Mozambique, and Inhambane 

 in the southern part of the province is reported as the chief 

 center of experiment in its cultivation. The best results are 

 obtained on the gray soil, and Captain Cardozo, late governor 

 of Inhambane, an enthusiastic and successful rubber planter, 

 conducted, in 1906, a series of experiments with four six year 

 old trees which were tapped for 92 days, from January 7 to 

 June 20. The average yield per tree was 290 grammes (10.15 

 ozs.), the average per tree, per day, 2.55 grammes, the product 

 being fine, clear, tough rubber, with good nerve. The fact 

 that the yield of latex showed a heavy increase the second 

 season, indicates good wound response. Manihot dichotoma was 

 also tried in the Quilimane district, but did not prove as satis- 

 factory as the gIa:iot'ii. 



While replete with valuable information, the book is notably 

 readable and affords an excellent idea of the productive possibili- 

 ties of this comparatively little-known land. 



THE MERCHANTS' ASSOCIATION OF NEW YORK. 



Founded to "foster the trade and welfare of New York," the 

 above organization through its publicity bureau, has sent out its 

 year book for 1913, which includes a list of the members of the 

 organization classified according to their lines of business. It is 

 an interesting publication, especially as showing the number of 

 prominent firms who have organized for the laudable purpose 

 for which the association was formed. An artistic engraving of 

 the great Woolworth building, in which the association has its 

 headquarters, forms the frontispiece to the year book. 



VALUABLE INFORMATION IN CONCISE FORM. 



Two pamphlets recently issued by the National Fire Protection 

 Association, New York, will be found to contain a fund of use- 

 ful information for manufacturers and others. They are "Sug- 

 gestions for Protection Against Lightning" and "Rules and Re- 

 quirements for Electric Lighting," both prepared by the National 

 Board of Fire Underwriters, and covering all that should be 

 known on these important subjects. 



