To Prevent The Escape Of Gas From India-rubber Tubing

t ubi Dg s slightly permeable to gas. T 1 1 e amount wbich encapes ihrocgh the tvalls of the tube ia, ho wever, veiy srnall ; it uiay be advisablo Kimetimes to render any escape imponible. TLÍ3 can nut bo done by giviuít tho tubiup a thin coat ing of a rarnisb made by diesolving odo pari and a half ol treacle and two parts of gum arabio iu stvcn parts of white wiiio and tinco and a huif parts of stroog {lcohol. 'l'ho trcaclo and gum must first he diss'ilvfi1. in the bter or vine, i and tho alcohol munt be added vcry lowly, constantly stiri ing the misture, or the gum will bü tlirown down. Setting; bad prncedeots has b?en the clücf business of Congres for the past. eigbt yearg.