and the outer part representing a black, 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 ...

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 ...