=The Therapeutics of Bismuth.=—In the _California Medical Gazette_, Dr. W. F. Mac Nutt has a paper on “Some of the Uses of Bismuth,” in which he states that he finds this drug more valuable than it is often supposed to be. Some of his ideas on its therapeutics are novel. “I believe,” he says, “that bismuth not only destroys the sulphuretted hydrogen present in the bowels, but is an antiseptic to albuminous matters, preventing their putrid decomposition. That bismuth destroys the sulphuretted hydrogen present in the bowels, is proved by the fact that if administered for a few hours in considerable quantity the flatulence disappears; and if a dose of oil is given, the evacuations are as black as tar, where the evacuations were natural or clay-coloured before the bismuth was given. It is the chemical action of the gas upon the bismuth which gives the evacuations their black colour. But a small portion of bismuth, when given in powder and in doses from gr. v to gr. xx, is dissolved in the stomach and absorbed. The remainder passes undissolved into the bowels, and while it may have some local anæsthetic action on the bowels as on the stomach, it will be comparatively inert unless there be sulphuretted hydrogen present. Its action on the sulphuretted hydrogen is more particularly demonstrated when given for chronic diarrhœa. Some have attributed to bismuth astringent, tonic, and sedative properties, on account of their success with it in chronic diarrhœa. Others have given it for the same disease without the slightest benefit, and consequently have denied that it has astringent, or sedative, or tonic properties. While the fact is, that in cases of diarrhœa that are caused or kept up by the poisonous effect of sulphuretted hydrogen, I have given bismuth, combined with a few grains of Dover’s powder, with more real benefit to the disease than any drug I could administer. Opium alone is useless, or worse. Charcoal, by absorbing the gas, has been, next to bismuth, the most beneficial. Chambers on ‘Indigestions’ says that it is ‘rare to find sulphuretted hydrogen or hydro-sulphate of ammonia excreted without watery or soft pultaceous stools. They appear to be purgative poisons.’ They are not always purgative poisons.”