"We're a coatings manufacturer and we will make coatings out of whatever quality materials are out there that we can get," Conwell says. "If the contractors want a coal tar sealer and we can get ...

Food colourings not actually based on coal tar Coal tar, the black viscous liquid left over when coal is cooked to make coke, became the source for scientific experimentation around 150 years ago ...

When coal tar is heated in a still by gradually increasing ... The majority of American boys and girls do not like to make a choice of farming as a livelihood. The farmer's educated daughters ...

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 ...

Commentary by Madeline Seveland Despite the recent 12-plus inches of snow, spring should be here soon, complete with snow melting, garden planning, and the chance to finally spend long hours ...

The Minnesota Legislature is considering a bill banning the use of coal tar-based products, and the League of Minnesota Cities has advised local governments to develop ordinances prohibiting or ...