But whether your thermometer hangs in the kitchen garden or at the back of the shrubbery, you must recognize one thing about it, namely, that it is an open-air plant. There are people who keep thermometers shut up indoors, which is both cruel and unnecessary. When you complain that the library is a little chilly--as surely you are entitled to--they look at the thermometer nailed to the Henry Fielding shelf and say, "Oh no; I don't think so. It's sixty-five." As if anybody wanted a thermometer to know if a room were cold or not. These people insult thermometers and their guests further by placing one of the former in the bathroom soap-dish, in order that the latter may discover whether it is a hot or cold bath which they are having. All decent people know that a hot bath is one which you can just bear to get into, and that a cold bath is one which you cannot bear to think of getting into, but have to for honour's sake. They do riot want to be told how many degrees Fahrenheit it is. The undersized temperature-taker which the doctor puts under your tongue before telling you to keep warm and take plenty of milk puddings is properly despised by every true thermometer- lover. Any record which it makes is too personal for a breakfast- table topic, and moreover it is a thermometer which affords no scope for the magnet. Altogether it is a contemptible thing. An occasional devotee will bite it in two before returning it to its owner, but this is rather a strong line to take. It is perhaps best to avoid it altogether by not being ill. A thermometer must always be treated with care, for the mercury once spilt can only be replaced with great difficulty. It is considered to be one of the most awkward things to pick up after dinner, and only a very steady hand will be successful. Some people with a gift for handling mercury or alcohol make their own thermometers; but even when you have got the stuff into the tube, it is always a question where to put the little figures. So much depends upon them.