There are a good many products from coal, of which the majority of people know nothing. Their number will go into the thousands, and research into this particular branch of inorganic chemistry is bringing new and rich rewards to scientists each year. One of the hydrocarbons distinctly produced from coal tar is benzole. This is the base of magenta red and blue coloring matters and of the oil of bitter almonds. This oil formerly came entirely from the vegetable product from which it takes its name, but now it is to a large extent made from benzole, and a chemically pure product is secured. The vegetable oil of bitter almonds contains a certain amount of prussic acid, which is a poisonous substance. Toluene, or tolulo, is another product from coal tar, which is the base of a great many chemicals. Benzoic acid, which used to be made almost entirely from plants, is now readily made from toluene. Carbolic acid is another product of tolulo. The latter is a colorless fluid with a smell very much like crude petroleum, while carbolic acid and salicylic acid, two of its products, are far from being sweet-smelling compounds. Yet this same tolulo is the basis of a number of very fragrant products.

Win-tergreen oil, much purer than from the plant, and generally preferred by confectioners and others who use it, is one; oil of cinnamon, cinna-mic acid, and oil of cloves are among the middle products which are in great demand. As yet the products of coal tar have not been made use of for medicines to any great extent, except as disinfectants, but, from experiments now going on, it is hoped to produce pure quinine from chinolene, one of the coal tar products, and scientists say that it is only a question of time when all alkaloids known, and probably others not now known, will be made from coal tar. It would take a good-sized book to even begin to give an idea of the commercial products alone of coal tar. Nearly every known color, except cochineal red and indigo blue, is made, and the latter was produced after nine years of experiment by the eminent German scientist, Byer of Munich, but the manufacture was so expensive that it has never been done except for scientific purposes. The logwood and madder dyes of our grandmothers' days are rarely seen in the market now, owing to the cheapness with hich they are manufactured.

Red ink, which formerly was made almost exclusively from carmine, is now made from eosine, one of the numerous coal-tar progeny. ___