An appliance for the prevention of mercury poisoning.

Occupational mercury poisoning on a large scale is unlikely to be seen by many industrial medical officers in future. This was not always so, for in the latter part of the nineteenth century the con dition was common in the metallurgical industries in which mercury was extracted from cinnabar, in mirror manufacture, in fire-gilding, in haircutting, in hat-making, and in the manufacture of thermo meters, barometers, and glow-lamps. In these and