Page:Across the Zodiac (Volume 1).djvu/207

The climate is comparatively equable in the Northern hemisphere, the summer of the South being hotter and the winter colder, as the planet is much nearer the Sun during the former. On an average, the solar disc seems about half as large as to eyes on Earth; but the continents lying in a belt around the middle of the planet, nearly the whole of its population enjoy the advantages of tropical regularity. There are two brief rainy seasons on the Equator and in its neighbourhood, and one at each of the tropics. Outside these the cold of winter is aggravated by cloud and mist. The barometer records from 20 inches to 21 inches at the sea-level. Storms are slight, brief, and infrequent; the tides are insignificant; and sea-voyages were safe and easy even before Martial ingenuity devised vessels which are almost independent of weather. During the greater part of the year a clear sky from the morning to the evening zyda may be reckoned upon with almost absolute confidence. A heavy dew, thoroughly watering the whole surface, rendering the rarity of rain no inconvenience to agriculture, falls during the earlier hours of the night, which nevertheless remains cloudy; while the periods of sunset and sunrise are, as I have already said, marked almost invariably by dense mist, extending from one to four thousand feet above the sea-level, according to latitude and season. From the dissipation of the morning to the fall of the evening mist, the tropical temperature ranges, according to the time of the day and year, from 24° to 35° C. A very sudden change takes place at sunset. Except within 28° of the Equator, night frosts prevail during no small part of the year. Fine nights are at all times chilly, and men employed