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Page 95
On the other hand , the light effects of an ordinary photograph depend chiefly on the angle of incidence upon the different parts of the model . The same beam of light which , when striking a surface at right angles illuminates an area ...
On the other hand , the light effects of an ordinary photograph depend chiefly on the angle of incidence upon the different parts of the model . The same beam of light which , when striking a surface at right angles illuminates an area ...
Page 338
-N . O. B. In spite of our advance in lighting during the last decade , neither the illuminating by gas nor by electricity was able to give us a light in any respect adapted to the needs of the brain worker .
-N . O. B. In spite of our advance in lighting during the last decade , neither the illuminating by gas nor by electricity was able to give us a light in any respect adapted to the needs of the brain worker .
Page 429
The two years . idea thus suggested itself to utilize that " living light , " in spite of its relatively low intensity , for the construction of lamps . Professor Molisch for this purpose filled up a glass bulb with sterilized gelatine ...
The two years . idea thus suggested itself to utilize that " living light , " in spite of its relatively low intensity , for the construction of lamps . Professor Molisch for this purpose filled up a glass bulb with sterilized gelatine ...
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Contents
MAGAZINE | 586 |
Cover Design LEJAREN HILLER | 591 |
Men of SciencePORTRAITS | 605 |
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