Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
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Strona 212
... produced at the same time as hydrogen and most of the early plants were installed to produce it for weld- ing and other purposes : to - day the demand for hydrogen is continually increasing and oxygen has become a more or less saleable ...
... produced at the same time as hydrogen and most of the early plants were installed to produce it for weld- ing and other purposes : to - day the demand for hydrogen is continually increasing and oxygen has become a more or less saleable ...
Strona 213
... produced by dropping granular ferrosilicon , made in an electric furnace , into a 35-40 per uent . solution of sodium hydroxide solution at 60-80 ° C . The operating conditions are chosen so as to produce gas at a uniform rate ...
... produced by dropping granular ferrosilicon , made in an electric furnace , into a 35-40 per uent . solution of sodium hydroxide solution at 60-80 ° C . The operating conditions are chosen so as to produce gas at a uniform rate ...
Strona 216
... producing conditions . Sound travels through the air as a wave of alternate compression and rarefaction , and if a ... produced in a room is reflected back and forth from walls , floor , and ceiling , a portion being absorbed at each ...
... producing conditions . Sound travels through the air as a wave of alternate compression and rarefaction , and if a ... produced in a room is reflected back and forth from walls , floor , and ceiling , a portion being absorbed at each ...
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absorbing absorption acid acoustic activity application Arts Association atom audience auditorium becomes bibliographies British cause ceiling cent Chemical chemistry coefficient complete contained cost cubic desired echo effect electricity electron element example excess existing experiment experimental expressed fact feet floor formation formula give given heat held hydrogen hydrogen ion importance increase industry intensity interest later less light lines London Manufacture March Marks material means measured metals methods million molecules necessary obtained Office optical ordinary organic organisation oxygen Patents plants Plaster possible present produced quantity references reflected reflected sound result reverberation Royal Sabine Science scientific seats Society solid solution sound space speaking specific spectrum square substances TABLE term theory tion total absorption Trade units University usual volume walls Watson weight window