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 108
... cause , without doubt , is the favorable position in which the inducing currents act upon the dispersed currents of the unmagnetic iron . The superficial action of one piece of iron or steel upon another , to which we have already ...
... cause , without doubt , is the favorable position in which the inducing currents act upon the dispersed currents of the unmagnetic iron . The superficial action of one piece of iron or steel upon another , to which we have already ...
Página 109
... cause of the superiority of electro - magnets is connected with a peculiarity in the position of the poles of permanent steel mag- nets . These poles , if the bar has any considerable thickness , are at a little distance inside of the ...
... cause of the superiority of electro - magnets is connected with a peculiarity in the position of the poles of permanent steel mag- nets . These poles , if the bar has any considerable thickness , are at a little distance inside of the ...
Página 129
... Causes of the Explosion of Steam - boilers , and of some newly discovered Properties of Heat , and other Matters for the Pur- pose of showing that the Application of Steam for the Production of Motive Force is susceptible both of ...
... Causes of the Explosion of Steam - boilers , and of some newly discovered Properties of Heat , and other Matters for the Pur- pose of showing that the Application of Steam for the Production of Motive Force is susceptible both of ...
Página 131
... cause could be assigned . The water withdrew with great precipitation , leaving the ground dry which had never before been visible , the fall being equal to four perpen- Transactions of the New York Literary and Philosophical Society ...
... cause could be assigned . The water withdrew with great precipitation , leaving the ground dry which had never before been visible , the fall being equal to four perpen- Transactions of the New York Literary and Philosophical Society ...
Página 132
... cause , destroyed several of his boats , but no lives were lost . This extraordinary event was looked upon as the ... caused the creek to retrograde a mile and a half , and to overflow its banks , where water was never be- fore seen , by ...
... cause , destroyed several of his boats , but no lives were lost . This extraordinary event was looked upon as the ... caused the creek to retrograde a mile and a half , and to overflow its banks , where water was never be- fore seen , by ...
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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,...