The increased temperature on the southern coast during the months of June and July operates, with other causes, to produce violent storms along the seaboard, called _tyfoons_, a word derived from the Chinese _ta-fung_, or ‘great wind.’ These destructive tornadoes occur from Hainan to Chusan, between July and October, gradually progressing northward as the season advances, and diminishing in fury in the higher latitudes. They annually occasion great losses to the native and foreign shipping in Chinese waters, more than half the sailing ships lost on that coast having suffered in them. Happily, their fury is oftenest spent at sea, but when they occur inland, the loss of life is fearful. In August, 1862, and September 21, 1874, the deaths reported in two such storms near Canton, Hongkong, and their vicinity, were upward of 30,000 each. In the latter instance the American steamer Alaska, of 3,500 tons, was lifted from her anchorage and quietly put down in five feet of water near the shore, from whence she was safely floated some months afterward. Tyfoons exhaust their force within a narrow track, which, in such cases as have been registered, lies in no uniform direction, other than from south to north, at a greater or less angle, along the coast. The principal phenomena indicating their approach are the direction of the wind, which commences to blow in soft zephyrs from the north, without, however, assuaging the heat or disturbing the stifling calm, and the falling barometer. The glass usually begins to fall several hours before the storm commences, and the rarefaction of the air is further shown by the heavy swell rolling in upon the beach, though the sea remains unruffled. The wind increases as it veers to the north-east, and from that point to south-east blows with the greatest force in fitful gusts. The rain falls heaviest toward the close of the gale, when the glass begins to rise. The barometer not unfrequently falls below 28 _in._ Capt. Krusenstern in 1804 records his surprise at seeing the mercury sink out of sight.