The "nit"--the egg of the louse--might be distinguished from scurf (although to the _naked_ eye it is very much like it in appearance) by the former fastening firmly on one of the hairs as a barnacle would on a rock, and by it not being readily brushed off as scurf would, which latter (scurf) is always loose. 259. _My child, in the summer time, is much tormented with fleas: what are the best remedies_? A small muslin bag, filled with camphor, placed in the cot or bed, will drive fleas away. Each flea-bite should, from time to time, be dressed by means of a camel's hair brush, with a drop or two of Spirit of Camphor; an ounce bottle of which ought, for the purpose, to be procured from a chemist. Camphor is also an excellent remedy to prevent bugs from biting. Bugs and fleas have a horror of camphor; and well they might, for it is death to them! There is a famous remedy for the destruction of fleas manufactured in France, entitled "_La Poudre Insecticide,_" which, although perfectly harmless to the human economy, is utterly destructive to fleas. Bugs are best destroyed either by Creosote or by oil of Turpentine: the places they do love to congregate in should be well saturated by means of a brush, with the creosote or with the oil of turpentine. A few dressings will effectually destroy both them and their young ones. 260. _Is not the pulse a great sign either of health or of disease_? It is, and every mother should have a general idea of what the pulse of children of different ages should be both in health and in disease. "Every person should know how to ascertain the state of the pulse in health; then, by comparing it with what it is when he is ailing, he may have some idea of the urgency of his case. Parents should know the healthy pulse of each child, since now and then a person is born with a peculiarly slow or fast pulse, and the very case in hand may be of such peculiarity. An infant's pulse is 140, a child of seven about 80, and from 20 to 60 years it is 70 beats a minute, declining to 60 at fourscore. A healthful grown person beats 70 times in a minute, declining to 60 at fourscore. At 60, if the pulse always exceeds 70, there is a disease; the machine working itself out, there is a fever or inflammation somewhere, and the body is feeding on itself, as in consumption, when the pulse is quick." 261. _Suppose a child to have had an attack either of inflammation of the lungs or of bronchitis, and to be much predisposed to a return: what precautions would you take to prevent either the one or the other for the future_?