For many years it has been customary in the treatment of men employed in lead works to give occasional purgatives, and it is, moreover, a common and proper precaution to keep a stock of some simple aperient medicine, preferably saline composed of sodium sulphate and magnesium sulphate, at the works in charge of the foreman, so that any man who so desires may obtain a dose of an ordinary aperient mixture. We have seen from the pathological evidence that the largest proportion of lead is excreted by the bowel, and that, therefore, the sweeping away of the bowel contents--particularly where constipation is set up--will naturally tend to remove from the body a good deal of the lead which has been already excreted into the intestine and which may presumably become reabsorbed unless it be swept away. In a large electric accumulator factory Epsom salts in the form of the granular effervescing preparation is much appreciated. In winter 50 per cent., and in summer 90 per cent. of the men are said to take a daily dose. In an important white-lead works chocolate tablets containing hypo-(thio-)sulphite of sodium are supplied to the workers. Another medicine made use of in lead works is the sulphuric acid lemonade, this being acidulated with sulphuric acid and flavoured with lemon. It is very questionable whether this substance has any definite effect in the special direction in which it is supposed to work--namely, that of forming an insoluble sulphate of lead in the stomach and so preventing its absorption. The use of this drug was suggested on the presumption that lead poisoning as a rule took its origin from the dust swallowed and converted into a soluble form in the stomach. As we have seen, there is very little evidence that this entrance of lead is of much importance, although it does occasionally take place. Furthermore, from the experiments of one of us [K. W. G.[1]], it has been found that the sulphate of lead is at any rate as soluble as other lead salts, such as white lead or litharge, when acted upon by normal gastric juice. With regard to the drinks supplied to workers in lead factories, it is highly important that some form of fluid should be supplied which the men may drink without harm, particularly in the more laborious forms of employment, and, above all, in the factories where smelting, desilverizing, etc., of lead is carried on. In these factories the use of some type of lemonade containing sodium citrate is to be recommended, as it has been shown that one of the pathological effects of lead absorption is to produce an increased viscosity of the blood, and the use of such drugs tends to some extent to diminish this. A drink containing a few grains of sodium citrate to the ounce and flavoured with lemon is freely drunk by workmen engaged in the laborious processes.