Substitute For Rubber

-Mr. San ders, of St. Petersburg, has succeeded in producing from the heavy oils of coal taí" a new substance which, in many cases, takes tlie place of india, rubber with advantage. itis preparad in the following manner: A given weight of a mixture in equal parts of wood oil and coal tar oil, or of coal tar and hemp oil, is heated for severa] bours, at a temperature of about 319 Fahr., so as to disengage the injurious substances and increase the viscosity üf the ïnasr, until it niay be drawn out in threads. A seeond qnantity, equal to the former, of linseed oil, preferably thickened by boilhig, is now added, and also from one-twentieth to one-tenth per cent of ozokerit with a little sperrnaceti. In the meanwhile, the mass is kept at a uniformly high temperature for some hours, wlien from one-iifth to one-half part of sulphur per cent is added, after which the product is moukled. or otherwise worked in the same manner as india rubber. Tke proportions of the three oils named ibove niay be varied so astoobtain a harder or a more elasüc sub stance, as may be required. The product is elastic and tenacious, standing the weather better than india-rubber, and is not deteriorated by great pressure or a high temperature. It is said tobe specially suitable f or the Ínsulation of telegraph wires, and may be employed alone or mixed with india rubber or similar resinous substances.