The Clouds and Fogs of San Francisco

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Robertson, 1912 - Clouds - 106 pages
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Page 67 - January . . February. .... March April ..... May.. Tune. ........ Tulv August September. . . . October November December...
Page 56 - In summer the afternoon sea fog varies in depth from 30 meters (100 feet) to 500 meters (1640 feet), the depth decreasing as the distance inland increases. On summer afternoons the velocity of the wind at San Francisco rises with almost clock-like regularity to about...
Page 49 - San Franciscans love their fog. When away from the city they pine for it, and especially during summer. Not without reason do they appreciate the cooling effect of the fog. It enables one to sleep through summer nights and rise refreshed and ready for the day's requirements.
Page 54 - ... to radiation is marked, fog forms early over the city and bay, dissipating before noon. As a rule the city hills and even the roofs of the tall office buildings are above the fog.
Page 10 - Many of them are quite as worthy of careful drawing as the leaves of a tree, the flowers of a field, the ripples on a stream or the texture of a carpet or marble pavement.
Page 54 - This lies about 200 meters, or 650 feet, above the city streets. A pall of smoke and fog drifts slowly seaward during the morning hours, especially in the spring and autumn, and returns again about one pm, driven in by the west wind.
Page 48 - ... it keeps the city cool in summer and thus makes for health; also it keeps the city warm in winter, preventing frosts and moderating the fall in temperature.
Page 38 - ... inhabitants, and the phenomena which it sometimes assumes. We are presented with a philosophical view of the Gulf Stream, which the author terms one of the most marvelous things in the sea ; he calls it " a river in the ocean," •whose banks and bottom are of cold water, and whose current is warm, with its fountain in the Gulf of Mexico, and its mouth in the Arctic Seas ; with a speed more rapid than the Mississippi or the Amazon, with waters as far out from the Gulf as the South Carolina Coast,...
Page 59 - Pacific fogs are more probably due to the mixture of two air streams, one warm and the other not so warm, but heavily laden with water vapor. The...
Page 49 - ... vapor lying beyond the heads and along the coast, are carried in through the Gate, at heights varying from sea level to 500 meters (1640 (feet).

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