June 1, 1920.] 



THE INDIA RUBBER WORLD 



583 



zene; the limit for animals is from 0.015 to 0.016-part of benzene 

 to 1.000 parts of air. Distillations should be carried out in im- 

 pervious apparatus with well-cooled condensers. All apparatus 

 which has contained benzene should never be entered for clean- 

 ing or repairs until all benzene has been removed, and thorough 

 ventilation has occurred. The workmen should have approved 

 breathing apparatus. A person overcome by benzene should be 

 removed into ficsh air promptly, and given artificial respiration. 

 Women are more susceptible than men to benzene poisoning. 

 (R. P. Albaagh. "Modern Medicine," 1919, volume 1, page 670.) 



CHEMICAL PATENTS. 



THE UNITED STATES. 



LE.\THER SuBSTiTiTE, comprising rubber and wax of the 

 montan class. The composition' has the tough slow-flexing 

 qualities of leather and is devoid of the springy, elastic qualities 

 of rubber. (John D. Prince, Boston, Massachusetts. United 

 States patent No. 1,336,858.) 



Dressing for Leather, etc. A quick drying dressing for 

 leather and the like, consisting of the following ingredients in 

 the proportions stated : asphaltum, 1 gallon ; benzine, 1 gallon ; 

 rubber cement, 1 quart ; black pigment. 1 pound ; Japan drier, 1 

 pint: beeswax, '/^ pound. (Alfred R. Caldwell, Pasadena, Cali- 

 fornia. United States patent No. 1,338,286.) 



THE UNITED KINGDOM. 



Electric Cable Coupositio.n. — For a protective and insulating 

 covering, rigid when cold, but readily pliable when warmed, 

 which permits the cable to be laid against irregular surfaces by 

 heating it at the necessary parts. It comprises rubber combined 

 with a large proportion of sulphur to which may also be added 

 asbestos, shellac, gutta percha, balata, silica, magnesia, chalk, 

 zinc oxide and the sulphates of antimony. When applied to the 

 cable the composition is vulcanized to produce a covering of the 

 nature of ebonite. The following percentage proportions are 

 given : rubber 35, reclaimed rubber 15, rubber substitute 5, ebonite 

 dust 10, silica 10, magnesia 10, and sulphur 15. (T. S. Seymour, 

 20 Mount Carmel, Derby, and St. Helens Cable & Rubber Co., 

 Arpley, Warrington, England. British patent No. 139,226.) 



AUSTRALIA. 



Preserving Lndia Rubber. — To prevent the oxidation of rub- 

 ber goods, the enzymes are destroyed by the application of a 

 10 per cent solution of ammonia containing about 0.3 per cent of a 

 saponaceous substance such as sodium oleate, laurate and 

 cresylic acid, carbonic acid or other antiseptic substance which 

 will not precipitate the soapy material. The solution is applied 

 to the latex, or to flexible rubber goods by immersion or by re- 

 peated superficial application. (F. E. Stowe, New South Wales. 

 Australian patent No. 3,364.) 



Reclaimed Rubber. Process for recovering rubber from waste. 

 (Acushnet Process Co., assignee of T. F. Fumess, Pennsylvania, 

 and P. E. Young. Massachusetts, inventors. Australian patent 

 No. 11,970.) 



THE FRENCH REPUBLIC. 

 Reclai-MED Rubber. Process for recovering rubber and cot- 

 ton from waste. (Acushnet Process Co., Inc. French patent No. 

 501,214.) 



GERMANY. 



Reclaimed Rubber. Process for reclaiming rubber from soft, 

 elastic, and tensile vulcanized goods. (Farbenfabriken, formerly 

 Friedrich Bayer & Co., Leverkusen, near Koln am Rhein. Ger- 

 man patent No. 303,984 "K.") 



Reclaimed Rubber. Process for reclaiming rubber from vul- 

 canized substances, having great stretching qualities, firmness, 

 and elasticity. (Farbenfabriken, formerly Friedrich Bayer & 

 Co., Leverkusen, near Koln am Rhein. German patent No. 

 305,667 "K.") 



LABORATORY APPARATUS. 



LABORATORY BURNER. 



use is that known as 



A new form of burner for laborat 

 ^*' the "Fisher." Although but re- 

 cently introduced it is rapidly finding 

 favor with chemists. 



It is provided with perforated 

 nickel grid for hot flame and brass 

 cap for Bunsen flame, thus com- 

 bining the features of two burners 

 in one. It will produce a flame I'A 

 inches in diameter, all of which is 

 hotter than the hot tip of a Bun- 

 sen flame, or it can be adjusted to 

 give a clear Bunsen flame, 7/16 

 inches in diameter. It will burn any 

 gas except acetylene. (Scientific 

 Materials Co., Pittsburgh, Penn- 

 svlvania.) 



AUTOGRAPHIC FABRIC TESTING MACHINE. 



A fecently patented autographic fabric testing device, 

 as shown in the illustration, consists of a horizontal fabric 

 testing machine and a chart holding mechanism. The latter 

 is appropriately con- 

 nected by means of 

 lever and cord and 

 pulley attachments with 

 the grips A, B, holding 

 the fabric test sample 

 C. The frame carry- 

 ing the chart is thus 

 made to move horizon- 

 tally in fixed relation 

 to the strain upon the 

 fabric, and vertically in 

 accordance with the 

 elongation of the fab- 

 ric. Thus, a curve may 

 Fabric Tester. ^g traced on the chart 



D by a suitable marker which will record the relations of 

 tensile strength and elongation of the specimen under test. 

 (Alfred E. Jury, Newark, New- 

 Jersey, assignor to the United 

 States Tire Co., New York City. 

 United States patent No. 1,327,- 

 393.) 



ALUMINUM FUIVNEL SUPPORT. 



Stoddard's aluminum fiinne 



support here illustrated is an 



improvement over the 



usual clumsy, wooden, 



two-funnel support. It is 



arranged for the use of 



four two-inch or two and 



one-half inch funnels 



within a small space. 



The stand is clean, neat r. , t- r. 



' J Stoddard's Funnel Support. 



and not easily corroded. 



(Central SLientific Co., 460 East Ohio street, Chicago, III.) 



