736 



THE INDIA RUBBER WORLD 



July 1, 1921 



Arm) post, or to any Amiy otTicer ; to any Navy or Marine 

 Recruiting Station; or direct to Major Harvey H. Fletcher, 

 Recruiting Adjutant, Headquarters 2nd Corps Area, Governors 

 Island, New York. 



tiT^ 



NEW TRADE PUBLICATIONS 



HE Black Art of Rlbber Compolnding — Chat No. 5." The 

 fifth in the series of pamphlets on rubber compounding is be- 

 ing distributed to thei rubber manufacturing trade by Binuey & 

 Smith Co., 81 Fulton street. New York, N. Y. The current is- 

 sue deals with, some of the practical aspects of the application of 

 their Micronex gas black to factory formulas, taking up the topics 

 of moisture, mill room flying, calendering and black in tire treads. 



"F.^NS FOR EfFICIENXY," TWO-COLOR FOLDER, No. 4455, DESCRIBES 



the Ventura fans of the Westinghouse Electric & Manufacturing 

 Co., East Pittsburgh, Pennsylvania. 



Orient — Dauti is the double title of a new illustrated gen- 

 eral and independent Dutch East Indian bi-monthly review, the 

 December number of which has just been received. 



The object of the magazine is to further a growing friendly 

 understanding between the many nationalities represented in 

 the Netherlands East Indies. 



THE EDITOR'S BOOK TABLE 



"CREDITS: HOW TO AVOW COMMERCIAL LOSSES (INCLUDING 

 cancellations and returns)." Pamphlet for credit men distributed free 

 by The Credit Guide, 415 Broadway, New York, N. Y. Thirty-three 

 pages. 5 by 8 inches. 



IN illustrating the usefulness of their own ser^'icc, and in em- 

 phasizing the need of more exact and intimate knowledge of a 

 debtor's true condition, before extending; a line of credit, than is 

 afforded by his own admissions and the information obtainable 

 through ordinary channels, the authors point to the fact that dur- 

 ing the past year, while the number of merchants in the country 

 had not increased, failures, however, had increased over 400 per 

 cent, in number and over $350,000,000 in amount. To help mini- 

 mize such loss. The Credit Guide issues a list every week of 

 "Credit Danger Notices," which numerous concerns testify has 

 saved them from accepting the accounts of others who soon went 

 bankrupt. Among the unfavorable signs listed in the reports are : 

 Noticeable slowing up in payments, collections filed, suits in- 

 stituted for past-due accounts, habitual returning of goods, un- 

 just cancellations, chattel mortgages on stock or fixtures, nu- 

 merous inquiries received, overbuying or underselling, and caution 

 suggested by creditors, all significant signals to a credit man and 

 w hich, it is claimed, are of more value in gaging a prospective cus- 

 tomer than old references or the reports of credit-rating agencies 

 which lack means of "super-checking" accounts up to date. 



"THE MOTOR TRtlCK TERMINAL." BITLLETIN NO. 7. ISSUED 

 by the Firestone Ship-by-Truck Bureau. Firestone Park, Akron, Ohio. 

 192L Copyright by the Fircstme Tire & Rubber Co. J>istribuled 

 gratis. Twenty-three paecs, 6 by 9. 



Makers of motor trucks, and the manufacturers of rubber tires 

 and numerous accessories, are realizing more than ever that if 

 the Ship-by-Truck movement is to gain any considerable impetus, 

 "free lance" operations must be regulated, if not by force of law, 

 then by economic measures that will be quite as effective. The 

 best corrective thus far suggested is the motor-truck terminal. 



The pamphlet emphasizes the present and prospective value of 

 transporting goods by truck, particularly with regard to speed, 

 low cost, and flexibility. It is also shown how, with motor 

 terminals in large cities, the confidence of consignors and con- 

 signees can be won and held by making motor terminal receipts 

 as valuable as those of a railroad freight terminal, and how 

 the motor terminal, through suitable insurance and business-like 

 methods, can hold the serving motor-truck concerns to strict 



account and directly advance and amply safeguard the interests 

 of shipper and receiver. 



Of especial interest' are the sections dealing comprehensively 

 with the field, functions, types, organization, and operation of the 

 motor terminal, as well as outlining its scope, solely and in inter- 

 terminal cooperation, as a national industry. 



"A FRENCH-ENGLISH DICTIONARY FOR CHEMISTS." BY AUSTIN 

 M. Patter.sun, Ph. D., formerly Editor of Chemical Abstracts. John 

 Wiley & Sons, Inc., New York. IHexible Cloth, 3&4 pages, 5 by 7 

 inches. 



In this book the author has produced a companion volume to 

 his "German-English Dictionary for Chemists," which will un- 

 questionably meet with an equal measure of approval. The book 

 contains over 32,000 entries covering the entire chemical field. 

 Special attention has been paid to idiomatic phrases. All common 

 words which are likely to appear in scientific literature are de- 

 fined and terms from the new chemical warfare are included. 

 Information on French chemical nomenclature is given in the in- 

 troduction, also a few principles of grammar. Equipped with this 

 book the reader of chemical literature is independent of any 

 other French dictionary. 



Section of the Hermetic Air-Bag 



HERMETIC AIR-BAGS 



The chief faults of the ordinary fabric air-bag are buckling and 

 the short service obtained before it fails by bursting or cracking 

 through by rough handling, owing to the rubber becoming injured 



by overcuring. These 

 sources of weakness 

 have been overcome in 

 the constructional fea- 

 tures of the air-bag 

 shown herewith. Three 

 noteworthy features of 

 this air-bag are (1) its 

 uniform expansion, (2) 

 sufficient compression at 

 the beads, (3) the low 

 air-bag cost per tire. 



The uniform and 

 equal expansion is ac- 

 complished by building the bag upon an air-tight container of 

 ring form similar to an inflated inner tube. A thick, heavy splice 

 is thus produced where the ends are brought together giving at 

 the joint much less expansion and contraction than in the rest of 

 the bag. 



Sufficient compression at the beads is secured by inserting or 

 adding a ring of relatively hard, vulcanizable material on the 

 inner circumference. This hard wedge not only holds the beads 

 of the uncured tire in place, but gives to them the necessary 

 compression during vulcanization. 



The most important of all air-bag considerations is the air-bag 

 cost per tire. Due to the simple method of manufacture, the same 

 amount and quality of raw materials are used for producing a 

 given size air-bag, at a much less cost than in ordinary practice. 

 There is a further saving in cost as the present bag is built 

 upon a tested air container originally, and is therefore perfect 

 when vulcanized. 



The factory records of a prominent tire manufacturer that 

 uses Hermetic air-bags exclusively, shows an average of 45 

 cures per bag, the maximum number of cures for any one bag 

 being 73 perfect tires. The percentage of seconds during the 

 same month was less than 3/10 of one per cent. During the 

 past six months the air-bag cost per tire on 33 by 4 shows a 

 reduction or saving of more than $1.30 a tire; 



The manufacture of air-bags of this construction is available 

 to any tire manufacturer under shop license from the patentees. — 

 Cupples Company, St. Louis, Missouri. ^ 



