_How to estimate temperatures._--Whatever method is adopted for warming a room, the housewife may be assured that the resulting temperature will not be pleasing to every member of the family. One will find it too warm, and another will at the same time find it too cold, and this not from any wilful captiousness but from the cause that we have already alluded to, that the feelings are a very uncertain test of temperature. It is therefore advisable to keep the air of the room as far as possible at a standard temperature. To do this it will be necessary to have a thermometer in the room, and to know what its readings indicate. When the thermometer registers 32° Fahr. or less, water will freeze in the room, and the vessels in which it is kept will burst; it is therefore wise, when it is anticipated that the temperature will fall below 32° Fahr., to empty the ewers and bottles that may be in the room. From 32° Fahr. to 40° Fahr. the room will be very cold, up to and including 58° Fahr. it will be too cold to be pleasant; the standard temperature may be taken as between 62° and 64° Fahr. It may appear a simple matter to hang up a thermometer and read it, but a little thought will show that it is not so easy as it seems. If, for instance, the thermometer is placed in front of the fire at a distance, say of four feet from it, what will its reading indicate? Will it be the temperature of the air of the room or the temperature of the fire, or if neither, what will it be? Suppose we have two identical thermometers, and hang them on adjacent walls, one of which is an outside wall, which of the two readings shall we take as that of the temperature of the room? It is not an easy matter to decide. In a sick-room, where one person's comfort only has to be considered the doctor will order the thermometer to be hung at the bed-head, but we cannot adopt this plan in a general sitting-room. CHEMICAL SCIENCE IN THE HOUSEHOLD In our endeavour to establish the claims of the science of chemistry to a prominent place in the educational equipment of women, all reference to those most interesting and important chemical phenomena that accompany the exercise of the physiological functions will be omitted; as also those which are most immediately concerned with the preparation of food. Attention will be confined to some of the common occurrences of daily life, the methods of dealing with which are typical of the method adopted in considering more important and abstruse problems.