Blue Coal, Pink Coal

Anthracite coal is always put through several washes before reaching the consumer. The Glen Alden Coal Co. of Buffalo and Rochester, N. Y., has made the last wash a blueing process. The idea: to make coal attractive, to give it advertising appeal under the trade name of "Blue Diamond." The dyeing process costs only three or four cents a ton, does not impair the heating power of coal.

Despatches from Pottsville, Pa., indicate that another anthracite company is experimenting with a dye to make its coal pink.