Year: 1875

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 The great cyclone which visited the United States during the squinoctial gale led a reporter to visit the weather | bureau and learn something about these cyclones which so regularly visit us. Cyclones extend over 0 circle from one hundred to five hundred miles in diame- ter, and sometimes a thousand miles. The approach of cyclone is generally announced by swell of the ocean, re- sulting from the action of the wind upon & neighborlng sea, while the waves thus agitated advance more rapidly than the storm. The character of the weather at any time is affected by so many circum- stances that it is of course impossible to predict what weather may be expected at a given time and place. To some ex- tent, however, such predictions are pos sible. When telegraphic reports can be easily received from the Mississippi valley it is possible to predict the ap. proach of storm twenty four hours ahead of it's coming. Along the Atlantic coast of the United States rain occurs most frequently with the wind from the northeast. It has been noted at New Haven that storms begin with an easterlv wind and end with westerly one; but, as the rain or snow with the first wind generally continues longest, the easterly wind is recorded as accompanying rain at a greater number of the regular hours of observation. Throughout most of the interior of the United States the principal part of the rain comes with a westerly wind.

 In great storms the wind for several hundred miles on both sides of the line of minimum pressure blows toward that line directly or obliquely. The force of the wind is in proportion to the sud denness and greatness of the depression of the barometer. In all great and sud den Impressions of the barometer there is much rain or snow. Most storms com mence in "far vest" but some com mence in the United States. The huc- tuations of the barometer are generally greater in the eastern than in western parts of the United States. During the passage of storms the wind generally changes from the eastward to the west ward by the south. The northern part of the storm generally travels more rapidly toward the east than the south ern part. During the high barometer on the day preceding the storm it is generally clear and mild in temperature, especially if very cold weather proceed ed. The temperature generally falls sud denly on the passage of the center of great storms, so that sometimes, when a storm is in the middle of the United States, the lowest temperature of the month will be in the west on the same day that the highest temperature is in the east.

 IL Sr,1,o hox h. easterly wind that we are to have 9 storm from the northeast, whereas the storm must necessarily come from the southwest, or the very opposite direc- tion. by reason of 8 low barometer being there. In the West Indies the cyclone season is from July to October. They originate near the equatorial limit of the trade winds, where cyclones have not merely movement of translation, but also a gyratory motion about the center of the storm. The motion of the air is spirally inward, as has been shown in the storms of the United States, but over the ocean the whirling motion IS usually more decided than it is over the land.

 North of the equator this gyratory motion is from right to left, or in di- rection contrary to that of the hands ot a watch south of the equator the mo- tion is from left to right, or in the same direction as that of the hands of a watch. Near the center of the hurri- cane there is generally great fall ot rain. Storms are caused by strong and extensive upward motion of the air, by which means it's vapor is condensed by the cold elevation. +