224 



THE INDIA RUBBER WORLD 



[March i, 1910. 



A GAGE FOR THE BARK OF "HEVEA." 



IN a recent number of Teysmania (Batavia, Java), Dr. Tromp 

 de Hass has described an instrument f< »r determining with 

 exactness the thickness of the bark of the plants containing 

 the essential elements of caoutchouc — an instrument which he 

 was led to have constructed in order to overcome the lack of 

 exactness that has obtained hitherto with the use of a punch, 

 the only instrument possible to be used. 



This instrument, represented by an illustration herewith, 

 consists principally of a blunt needle moving in a brass frame- 

 work, where it is controlled by a very short thread screw 

 operated by a hand wheel G. Between the needle A and the 



Measuring the Thickness or "Hevea" Bark. 



screw F there is a small disk II, the edge of which grazes the 

 graduated scale (' fastened to one side of the framework. The 



ratus is furnished with a handle B. It is operated by 

 turning the screw until the needle is entirely clear of the 

 framework, and it is then sunk into the bark until it reaches 

 the wood. The screw is then turned inversely to bring the 

 framework down until it touches the bark, care being taken 

 tiol to have the needle come out behind when this has been 

 done, the needle is withdrawn by turning the screw until it 

 reaches the top of the framework. A simple reading will then 

 give in millimeters the depth reached by the needle, and con- 



ently the thickness of the bark. The price of the apparatus 

 is 9.50 florins [= about 38 cents]. 



NEW TRADE PUBLICATIONS. 



NTF.W England Butt Co. (Providence, Rhode Island 1. issue 

 * ' a new illustrated catalogue of their Braiders and Machinery 

 fi 1 lii^nlaiiiiL; Wires and Cables, in the form of a separate de- 

 tachable leaf for each machine described. Their production in 

 tin- line is extensive nd varied, representing the latest improved 

 devices for the different lines of work for which they supply 

 equipment I'" sides, tin catalogue is a tasteful example of the 

 printer's art. {-\A in. x 11 in. 51 leaves.] 



\Yi ' I (Chicago), devote their Bulletin No 



1 105 to Selection, Installation and Wiring of Intercommunicating 

 Telephone Systems. The use of such systems is becoming 

 rapidly larger, and involves not only the best work of the elec- 

 trical engineer, but an important consumption of india-rubber. 

 I7A1 in. \ invi in. 40 pag< 



The Goodyear Tire and Rubber Co. (Akron, Ohio), issue "A 

 Dictionar; for 'Tired' People," which diversifies practical hints 

 with regard to automobile tires with a vocabulary of facetious 

 interpretations of motoring terms which cannot fail to produce 

 many a laugh. [3A4 in. x sVa in- 60 pages | 



Stein Laplock Tire Co. (New Vorki. issue an illustrated 

 booklet devoted to the distinctive features of their "Laplock," 

 invented by Charles Stein, as contrasted with other types of 

 pneumatics. [3 7 <£ in. x 6 in. 6 pages.] 



ALSO RECEIVED. 



The Bristol Co., Waterbury, Connecticut. = Bulletin No. 108 — William 

 11. Bristol Indicating Electric Pyrometers for Hardening Furnaces. 

 8 pages. Bulletin No. 112— Bristol's Recording Thermometers. 4 pages. 

 Bulletin No. 113 — Bristol's Patent Steel Belt Lacing. 8 pages. Bulletin 

 No. 115 — Indicating and Recording Units of William H. Bristol Electric 

 Pyrometers for Annealing Furnaces. 8 pages. 



Strong Machinery and Supply Co., New York. — Strong's Tisafine 

 Belting. 12 pages. 



Neidlinger Brothers, New York. — Hospital Supplies. 48 pages. Drug- 

 gists' Glassware and Sundries. Hospital Supplies. 96 pages. 



Preston Fabric Tire Co., Buffalo. New York.«Our Side of the Tire 

 Problem. ■ 8 pages. 



Joseph Dixon Crucible Co., Jersey City, New Jersey=Valuable Graphite 

 Products. 22 pages. 



Wirt & Knox Manufacturing Co., No. 22 North Fourth street, Phila- 

 delphia=Wirt's Patent Hose Carts, Reels, and Racks. Catalogue for 1909. 

 44 pages^ The "Royal" Swinging Hose Rack. 4 pages. 



The Cawn Mining and Manufacturing Co., Canton, Ohio=Aluminite, 

 Wood and Iron Fillers. 4 pages. 



Richard Beaumont, Kankakee, Illinois=The Beaumont Fire Hydrant. 

 24 pages. 



Westinghouse Electric and Manufacturing Co., Pittsburgh, Pennsylvania 

 ^Electrically Heated Glue Pots. 20 pages. Wattmeters and How to 

 Read Them. 12 pages. Fan Motors. 16 p-ages. 



Morgan & Wright, Detroit. Michigan — Motorcycle Tires. 16 pages. 



The North British Rubber Co., Limited, Edinburgh=North British Aero- 

 plane and Balloon Fabrics. 4 pages. 



MORE CALENDARS FOR 1910. 



Two artistic calendars for 1910, issued by The North British 

 Rubber Co., Limited (Edinburgh), have failed to have earlier 

 mention in The India Rubber World through a regrettable mis- 

 hap. One reminds the daily observer of the wide range of the 

 company's products in rubber goods, while the other serves only 

 to call attention to "North British" clincher tires. Both are 

 excellent specimens of lithography, and altogether are the hand- 

 somest calendars issued by the rubber trade so far as we have 

 seen this year. 



The United States Rubber Co. have been distributing in the 

 trade one of the handsomest calendars yet seen in the \k\\ year. 

 The monthly tear-off leaves are attractive by reason of the color 

 contrasts, and above them is a tasteful design in which the white 

 lettering used for the company's name is artistically offset by the 

 green leaves of the Hevea rubber tree. 



The twelve leaves which make up this year's calendar of the 

 Birmingham Iron Foundry (Derby. Connecticut) have at the 

 head of each a well executed illustration of one of their rubber 

 factory machines — a different one for each mouth. 



James Boyd & Brother. Inc., Philadelphia, as usual, have been 

 sending out a combined calendar and memorandum pad. com- 

 prising a tear off leaf for every week in the year. Incidentally 

 these ballet- call attention to a wide range of mechanical rub- 

 ber goods f r which this linn are distributors. 



From the "Firestone" Art Panel Calendar. 

 [Firestom Ti e and Rubber Co.] 



