Gray

(gra). I. Of a color between white and black. 2. Having gray hairs. G. Hepatization. See Hepatization and Pneumonia. G. Induration. See Induration. G. Infiltration. See Infl/ti G. Lanolin Ointment. See G. Oil. G. Matter, the cinerea. See Brain . G. Oil, Oleum cinereum, a semifluid, fatty, mercurial liquid introduced into medicine by Lang, of Vienna, in 1886. It is used in the treatment of syphilis by injections. It is pn as follows: A given quantity of lanolin 1 drams is rubbed up with sufficient chloroform emulsify it. This mixture is to be thoroughly triturat ed, during which operation the chloroform will evap orate. While the mixture is still in a fluid metallic mercury to the amount of double the quant it of the lanolin is to be added, the trituration meanwhile continued. As a result, a pomade is left, which represents two parts of mercury and le part of lanolin. This is called strong gray lanolin itment. From this salve-basis a 50 per cent, oleum lereum, or gray oil, may be obtained by mixing three with one part of olive-oil. A mild gray lol in ointment may be made in the same manner as strong, by taking equal parts of lanolin and merand thoroughly mixing them. From this salves is a 30 per cent, gray oil may be made by mixing six parts with four parts of fresh almond-oil or olive oil. G. Powder, hydrargyrum cum creta. See Hydrargyrum .