Proceedings of the American Academy of Arts and Sciences, Volumen2Metcalf and Company, 1852 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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Página 121
... changes of dip in a needle thus exposed , the law of continuity is not observed . If we substitute for the large magnet the magnetism of the earth , we have the same result . A dipping - needle , placed so that the axis on which it ...
... changes of dip in a needle thus exposed , the law of continuity is not observed . If we substitute for the large magnet the magnetism of the earth , we have the same result . A dipping - needle , placed so that the axis on which it ...
Página 122
... changes once or more in passing from one condition of nature to another continuously connected with it . Thus the attraction of a solid sphere is as the square of the distance from the centre inversely , so long as the attracted body is ...
... changes once or more in passing from one condition of nature to another continuously connected with it . Thus the attraction of a solid sphere is as the square of the distance from the centre inversely , so long as the attracted body is ...
Página 123
... change of the law will produce only a gradual change in the velocity of the moving body . This consideration is sufficient to show that the law of continuity is observed , to the exclusion of violent changes in matter . Nevertheless , a ...
... change of the law will produce only a gradual change in the velocity of the moving body . This consideration is sufficient to show that the law of continuity is observed , to the exclusion of violent changes in matter . Nevertheless , a ...
Página 127
... changes in the main ship - channel , which have been so gratefully acknowledged by the Chamber of Commerce of New York ? or of Blake's new channel in Delaware Bay ? or of Davis's discoveries of the shoals in the vicinity of Nantucket ...
... changes in the main ship - channel , which have been so gratefully acknowledged by the Chamber of Commerce of New York ? or of Blake's new channel in Delaware Bay ? or of Davis's discoveries of the shoals in the vicinity of Nantucket ...
Página 133
... changes in the water - level . These observations extended from the 15th of July to the 30th of August , and from them he infers that the changes in the elevation of the waters are entirely too variable to be traced to any regular ...
... changes in the water - level . These observations extended from the 15th of July to the 30th of August , and from them he infers that the changes in the elevation of the waters are entirely too variable to be traced to any regular ...
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Página 136 - Similar phenomena occur on several of the Swiss lakes. Professor Mather, who observed the barometer at Copper Harbour during one of these fluctuations, remarks : — " As a general thing, fluctuations in the barometer accompanied fluctuations in the level of the water ; but sometimes the water-level varied rapidly in the harbour while no such variations occurred in the barometer at the place of observation." As a general rule, these variations in the water-level indicate the approach of a storm,...