Annals of the Astronomical Observatory of Harvard CollegeHetcalf and Company, 1892 - 156 ページ |
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104 Blue Hill 12 Portland 120 Fitchburg 122 Framingham 123 Gilbertville 146 Nantucket 147 New Bedford 149 Newburyport 152 Northampton 153 Plymouth 155 Provincetown 163 Taunton 201 Block Island 202 Bristol 207 Providence 224 Hartford 229 New London 230 Shelton 233 Voluntown 234 Wallingford 235 Waterbury 254 New York 256 Setauket 258 Poughkeepsie 34 Berlin Mills 37 Concord 39 Hanover 40 Lake Village 45 Nashua 47 North Conway 49 Plymouth 51 Stratford 52 Walpole 73 Burlington 74 Chelsea 75 Cornwall 77 Jacksonville 78 Lunenburgh 82 Northfield anticyclone applied in calculating Bar Harbor Blue Hill Brattleboro clouds Conn Connecticut Cotuit cyclonic area cyclonic centre east Eastport England Fiskdale Gilbertville Hampshire inches Jonesport July Lake Cochituate Lewiston lightning Mass Massachusetts mean moved Nantucket North Conway northeast Northfield northwest Olneyville Poughkeepsie PRECIPITATION pressure Provincetown readings of thermometer Setauket southwest STATION Taunton temperature thunderstorm tornado Voluntown weather whirl Wolfboro
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130 ページ - It seems easy to conceive, how, by this successive condensation from above, the spout appears to drop or descend from the cloud, though the materials of which it is composed are all the while ascending. The condensation of the moisture, contained in so great a quantity of warm air as may be supposed to rise in a short time in this prodigiously rapid whirl, is, perhaps, sufficient to form a great extent of cloud, though the spout should be over land, as those at Hatfield ; and, if the land happens...
132 ページ - ... Thus, all hurricanes or violent storms may perhaps be considered as cyclones or revolving winds. But it by no means follows that all cyclones are either hurricanes, gales, or storms. For the word is not designed to express the degree of activity or force, which may be manifested in the moving disk or stratum of rotating atmosphere to which it is applied. It often designates light and feeble winds, as well as those which are strong and violent...
130 ページ - The whole effect produced, and to my own mind well and clearly defined, was precisely what we should have if we could suddenly place in a vacuum a building filled with atmospheric air of ordinary tension. Even the foundation walls were inclined outwards, and there was -•% every evidence of a force acting from the interior to the exterior.
116 ページ - The observer's description of the thermometer used for the rest of the observations is as follows : " My thermometer was of Mr. Hawksbee's make, filled with spirit of wine. Ye scale is divided into 100 parts, beginning from a certain point above marked 0 and ye 100th degree falls just above ye bulb of ye thermometer. Ye freezing point is numbered 65°. Ye divisions are upward to 8* above zero. Ye observations are expressed in the degrees with their decimal parts The instrument shows the highest temperature...
121 ページ - ... hurricane could take place, unless a violent rotatory or whirling action be first produced, and that in many and perhaps most cases, the rotatory portion is not in contact with the earth. Mr. Arch. Smith said there was one point which must not be overlooked in any correct comparison of the rival theories. From the principle of the conservation of areas it was perfectly certain, that if a storm was caused in the manner supposed by Mr. Espy, there must be a rotation, greater or less, in the centre....
120 ページ - ... this blowing of the wind soon created a great vortex, gyration, and whirling among the clouds, the centre of which now and then dropt down in the shape of a thick long black tube, commonly called a spout ; in which I could distinctly see a motion, like that of a screw, continually drawing upwards, and screwing up as it were whatever it touched.
120 ページ - ... proceeded the distance of six miles with the most destructive violence, tearing up and scattering about the trees, stones, fences, and every thing else in its way, forming a continued lane of ruins, of a few rods wide. It met with only one dwelling-house in its course, that of one David Lynde, on which it fell with the utmost fury, and in a moment effected its complete destruction.
261 ページ - The expedition was assisted by. a grant from the Bache Fund of the National Academy of Sciences, and by the hearty cooperation of the Peruvian government, which provided free transportation and other assistance within Peru.
120 ページ - Leicester, 40 miles westward, about five o'clock the sky looked strangely ; clouds from the south-west and north-west seemed to rush together very swiftly, and immediately on their meeting commenced a circular motion ; presently after which a terrible noise was heard. . The whirlwind passed along from south-west to north-west. »• Its first effects were discernible on a hill, where several trees were thrown down at considerable distances from each other.
128 ページ - The movement of the upper one was shown by an index, that pointed to the right or to the left according to the direction of the motion.