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 74
... changes , it must be remembered that pipes under ground will preserve a tolerably even temperature ; and be the effect of increased heat what it may , it has been more energetic in Philadelphia than it ever can be in Boston . " The ...
... changes , it must be remembered that pipes under ground will preserve a tolerably even temperature ; and be the effect of increased heat what it may , it has been more energetic in Philadelphia than it ever can be in Boston . " The ...
Página 85
... change that takes place when a solution of copperas is exposed to the air may be thus represented : - 4 ( Fe O , S03 ) + 20 = Fe2O3 , 3 S O3 + Fe2O3 , S 03 . The latter compound is insoluble in water . GMELIN . - The constitution of the ...
... change that takes place when a solution of copperas is exposed to the air may be thus represented : - 4 ( Fe O , S03 ) + 20 = Fe2O3 , 3 S O3 + Fe2O3 , S 03 . The latter compound is insoluble in water . GMELIN . - The constitution of the ...
Página 87
... change of water . The bars in the Cochituate remained quite bright , and those in the other waters were but slightly coated . Two bars in 15cc . for thir- teen consecutive days , without changing the water , gave , in Cochituate , 0.500 ...
... change of water . The bars in the Cochituate remained quite bright , and those in the other waters were but slightly coated . Two bars in 15cc . for thir- teen consecutive days , without changing the water , gave , in Cochituate , 0.500 ...
Página 100
... changes of former periods are to be as- cribed to causes now in operation . Among the present active causes of change , the ocean holds a prominent place . But it has been sup- posed to operate principally by means of the agitations of ...
... changes of former periods are to be as- cribed to causes now in operation . Among the present active causes of change , the ocean holds a prominent place . But it has been sup- posed to operate principally by means of the agitations of ...
Página 120
... needle which is free to move on a horizontal axis only , when this axis is parallel to the axis of the large magnet , the law of continuity will be observed in the changes of dip 120 PROCEEDINGS OF THE AMERICAN ACADEMY.
... needle which is free to move on a horizontal axis only , when this axis is parallel to the axis of the large magnet , the law of continuity will be observed in the changes of dip 120 PROCEEDINGS OF THE AMERICAN ACADEMY.
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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,...