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Página 277
Selenium certainly varied a flow of electric current according to the strength of light being shown on it ; but it did not respond nearly quickly enough , and when it had responded it was slow to withdraw its effect .
Selenium certainly varied a flow of electric current according to the strength of light being shown on it ; but it did not respond nearly quickly enough , and when it had responded it was slow to withdraw its effect .
Página 278
end take the series of currents received , change them back to light , and arrange these patches of light and shade into a picture of the scene . One of the simplest ways to do this , it has been found , is to have a large disc with ...
end take the series of currents received , change them back to light , and arrange these patches of light and shade into a picture of the scene . One of the simplest ways to do this , it has been found , is to have a large disc with ...
Página 241
Visible light from the lamp is filtered away and all other illuminations are extinguished . A simple instantaneous exposure is made with the camera , and after development the negative is fully exposed and equal to one taken by ...
Visible light from the lamp is filtered away and all other illuminations are extinguished . A simple instantaneous exposure is made with the camera , and after development the negative is fully exposed and equal to one taken by ...
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ART PAGE | 1 |
The Solution of the Egyptian Problem | 2 |
The Great Ones of the | 3 |
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action American appear artist authority become betting British called cause Cavalier century character Church coal continue course Court deal demand effect England English established existing experience expressed fact followed force foreign France French give given Government hand hope House human important increase industry influence interest Italy less light living Lord March matter means Menander ment method mind nature never once party passed perhaps period person Plautus play political possible practice present President probably production question race reason received recent regard remains result Russia seems success taken things thought tion trade true turn United whole Wilson writing young