From October to May that portion of the Rocky Mountain plateau that includes Arizona, New Mexico, and the northern interior of Old Mexico has one of the finest climates in the world for those afflicted with pulmonary diseases, as the sunshine is abundant and the day and night temperatures such as to permit an almost continuous out-of-doors existence. But the heat and the extreme dryness of the air in June, July, August, and the first half of September is irritating to the nerves and debilitating in general. Fortunately, when the conditions are not favorable in the extreme southwest part of the country, they are at their best in the mountains of the Middle Atlantic States and New England, which offer to the pleasure or the health seeker a cool, pure air unsurpassed by any other region of the earth. For an all-the-year climate for the health seeker, it only can be said that the ideal conditions do not continue at any place throughout the entire year. Possibly it is well that it is so, as a change may be beneficial for no reason except that it is a change. There is one great caution ever to be borne in mind, and that is that the health seeker must not continue or repeat the same unhygienic life in his new climate that brought on the disease in the old. =Climate of Cuba.= The climate of one tropical country may differ materially from that of another in the same latitude as a result of difference in altitude, proximity to large bodies of water, and position with respect to the prevailing winds. Cuba being in the region of the northeast trade winds, more rain falls on the north side of its mountains than on the south side. The temperature of the southeast coast is higher than it is on the northern and western coasts, and the range of temperature everywhere between night and day is small, rarely ten degrees and usually much less. It therefore has a warm, humid, and monotonous climate, except in the high levels of its mountains. The winter tourist will find the conditions of the greater part of the island somewhat similar to those in the region of Miami, Florida, but warmer. Havana is not so hot as Santiago. The highest temperature ever recorded at Havana is 101° and the lowest 50°. A fairly pleasant temperature always can be found within a short ride to the mountains. As in most tropical countries, Cuba has a dry and a wet season. The rainy season is May to October. In the early part of September, 1900, over thirty-six inches of rain fell within thirty-six hours at Santiago. As a rule the precipitation is in the shape of heavy showers, the clouds clearing as soon as the rain ceases; the showers usually occur in the afternoon. Cuba, in common with all the islands of the West Indies, occasionally is visited by destructive hurricanes; these storms mainly are confined to the period August to October. Frequent terrific thunderstorms occur in summer.