Rose-Color Produced from Green.
Obtain a small quantity of roseine,—one of the wonderful products obtained from gas-tar, and employed extensively in producing what are called by manufacturers the "magenta colors." Roseine exists in the shape of minute crystals, resembling those of sugar. They are hard and dry, and of the most brilliant emerald green. Drop five or six of these little crystals into a large glass of limpid water. They will dissolve; but instead of giving a green solution, the product is an exquisite crimson-rose color, the color seeming to trickle from the surface of the water downward. When the solution has proceeded for a short time, stir the water with a glass rod, and the uncolored portion of it will become carmine.