OCR Text |
Show (ilyeerlno ns a Wool Preservative. Jn order to make wool tissues water proof manufacturers have to expose the fabric to tuieratnre8 as high as 266 ti 84 d"gs. Fahrenheit, and it has beeD found thai the tissue thus treated lose nil its resistance. Up to 230 degs. there, la uo change in wool or woolen goods, bnt when heated to 2fi6 degs. or above, both turn yellow and show evidences of joiubustion. By a series of experiments Mr. ,1. Perzog, an eminent French analytical an-alytical chemist, has discovered a new process iiy means of which wool thread! nnd fabrics may be made to retain their durability and original resistance under high temperature during the process of manufacture, . , Acting upon the established fact that glycerine greatly prevent evaporation of humidity, Mr. Perrog saturated some woolen fabric with a solution containing contain-ing 10 per cent, of glycerine, aud exposed ex-posed them to high temperatures. The fabrics thus treated showed not the slightest change under a temperature of 24 (legs. Fahrenheit, and they retained 13 per cent, of the glycerine. The di covery of this simple principle rertiovee one of the greatest diffitialties with Wbkh. manufacturers of waterproof (ttbriai Lave had tocuatond. |