This is similarly prepared to the antidiphtheric serum, the horses being injected with tetanus toxin.

Serum Antistreptococcicum. Antistrepticoccic Serum. Dose 30 c.c. daily subcutaneously.

The serum obtained from the blood of a horse immunised by repeated injections of at first killed cultures of Streoptococcis pyogenes or S. ery-sipelatus of many different stems, and later of virulent living culture.

Serum Antimeningococcicum. A serum prepared in an analogous manner by injections of the Diplococcus intracellularis, and used in the treatment of Cerebro-spinal Meningitis.

Theobromina. Theobromine. Dose, 5 - 10 grs.; 3 - 6 dgms. A dimethylxanthin obtained from the seeds of Theobroma Cacao. A white crystalline powder odourless with a bitter taste. Soluble 1 in 1,700 of water, 1 in 1,400 of alcohol. A compound with sodium and sodium salicylate, Theobromine Sodio-salicylate, has a sweetish taste and is more soluble, 1 in 1 of water, and is hence used in place of the alkaloid alone. (It is sold under the trade name of Diuretin.)

Terpini Hydras. Terpin Hydrate. (Terpene Hydrate.) Dose, 3 - 10 grs.; 3 - 6 dgms.

An alcoholic hydrate prepared from oil of turpentine. Colourless, glistening crystals or a crystalline powder, with a slight aromatic odour and a bitter taste. Soluble 1 in 280 of water, 1 in 14 of alcohol.

Tuberculinum. Tuberculin. (Old.) Three months old glycerine - veal broth cultures of the Bacillus tuberculosis are concentrated over a water-bath and filtered through a porcelain filter to remove the bacilli. For treatment New Tuberculin or other similar preparations are more largely used.