hard mass. FAILURE OF COAL TAB OIL FOR THE PRESERVATION OF WOOD. The causes of the failure are explained by the fact that coal tar does not yield any creosote, even if treated in like manner as ...

Understanding Coal Tar dyes in Food: Facts and Controversies Food colouring and other additives derived from coal tar have come in for some bad press recently. Hugh Westbrook delves into the ...

"Coal tar is a little more forgiving ... and it will help it last longer. We really hammer hard to our contractors that they need to use the right sand and the right amount of sand to get the ...

THE numerous products obtained from coal-tar are ever increasing in importance, not so much, perhaps, because of the isolation of new substances or new derivatives of the older materials ...

These colors, for there are many of them, have been prepared from the alkalies of coal tar by Messr3. W. Perkins and A. H. Church, two rising discoverers, and have been called by them nitroso ...