Dr. R. G. ECCLES, in The Dietetic and Hygienic Gazette of New York, makes some discrimination of worth regarding dirt which is clean, and dirt which is unclean. He tells us that mud and soil, coal dust and ashes, paint and varnish, are almost as harmless as the clothes we wear; but the people that will permit such dirt as that are likely to be unclean otherwise. Some of the most dangerous dirt is that which is invisible. He warns us that we should not wash hands simply by the clock; but if we are engaged in that in which germs are likely to be passed on at all to others, the only proper way is to precede that work by a thorough washing of hands in soap and water. Some hands will pollute water by a mere touch, we are told, and can not be shaken without leaving behind evidences of unnamable dirt; and these are the kinds of hands, many times, that handle our bread, our meat, our fruit, our vegetables, our pastry, and our money. It is supposed that most normal persons wash their hands and faces on getting up in the morning, or after particularly dirty forms of work; but with very many the absence of visible signs of dirt is sufficient excuse for the neglect of washing at all other times of the day, and he says, “How to combat this vicious impression is one of the most serious problems of hygiene.” He refers to servants who are not particular, and some of whom seem to be abnormal disease spreaders. He cites the celebrated case of “Typhoid Mary,” who worked in one household in which six persons out of eleven were taken down with typhoid fever. In another town and in another household seven members out of nine fell victims; and in another state, four of her fellow servants developed the disease. The doctor suggests that it will be well for the mistress of the house to keep a careful watch of the habits of her servants, and learn whether they wash their hands in the dish-water or in the wash-basin.