As travelling becomes easier all over the world, an increasing number of people who suffer from English winters are tempted to migrate annually in pursuit of sunshine and a more genial climate. Formerly fewer pleasant places were accessible, and there was comparatively little choice; and as to keep a consumptive person warm through the winter was supposed to be the one thing needful, little attention was paid to other peculiarities of climate. It is only of late years that doctors have become fully alive to the very different effects produced on invalids by much the same temperature in different places. Experience has shown that warmth is by no means the only point to be considered. People who coughed all day and all night at Nice have altogether ceased to cough when they went to Pau, where it was quite as cold. On the other hand, it was found that some people got ill at Pau who were ill nowhere else. Madeira, where it is _never_ cold, is going out of repute as a place for consumptive patients; and to the utter astonishment of everybody, it was found that consumptive people who spent a winter in Canada not only did not die immediately but got better. Climates came to be divided into moist-relaxing, as Madeira, Pisa, and Torquay; dry-relaxing (_sedative_, I believe, is the correct word), as Pau; exciting, as Cannes and Nice; and so on. Doctors became more discriminating in different cases, as far as their geographical knowledge enabled them. But they have something better to do than to go about sniffing the air and observing thermometers and anemometers and hygrometers in half a dozen South-European or Devonshire watering-places. They are obliged for the most part to judge of them from the reports of the local doctors at each place, each of whom is likely to be a believer in his own particular place, and directly interested in making it popular.