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 75
... give value to these determinations was that of the health of the citizens of Philadelphia , New York , and Boston , so far as it might be influenced by the waters served through lead in the respective cities . This was to be decided ...
... give value to these determinations was that of the health of the citizens of Philadelphia , New York , and Boston , so far as it might be influenced by the waters served through lead in the respective cities . This was to be decided ...
Página 80
... give a direct precipitate with sulphide of ammonium . This being decided in the negative , fifty cubic centimetres or grammes of water ( corresponding with fifty parts of the scale of solutions ) are carefully evaporated to dryness and ...
... give a direct precipitate with sulphide of ammonium . This being decided in the negative , fifty cubic centimetres or grammes of water ( corresponding with fifty parts of the scale of solutions ) are carefully evaporated to dryness and ...
Página 84
... give to the experiment the ad- vantage of the nascent state which in actual practice must occur , and to give to the view an entirely unobjectionable foundation , I added to a solution of nitrate of lead , first , potassa , which threw ...
... give to the experiment the ad- vantage of the nascent state which in actual practice must occur , and to give to the view an entirely unobjectionable foundation , I added to a solution of nitrate of lead , first , potassa , which threw ...
Página 85
... gives it as 2 Fe2 03 +3 S03 + 8 HO . An acid salt remains in solution , which is probably what Dr. Dana would have understood from the statement that the above decomposition produces free sulphuric acid . - the potash to unite with the ...
... gives it as 2 Fe2 03 +3 S03 + 8 HO . An acid salt remains in solution , which is probably what Dr. Dana would have understood from the statement that the above decomposition produces free sulphuric acid . - the potash to unite with the ...
Página 103
... give the appearance of moving pillars of dust extending from the earth to the skies . Bruce , in his travels , describes them as tall pillars , and says he sometimes saw many of them travelling together . " The materials raised on the ...
... give the appearance of moving pillars of dust extending from the earth to the skies . Bruce , in his travels , describes them as tall pillars , and says he sometimes saw many of them travelling together . " The materials raised on the ...
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