The National Geographic Magazine, Volume 91National Geographic Society, 1947 - Geography Indexes kept up to date with supplements. |
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Page 136
... light - as - a - feather , perfectly balanced in your hand ( because of the Zephyr - Light magnesium body construction , and redesign of optical parts ) . Incomparably brilliant and high- contrast image ( Balcote , the Bausch & Lomb ...
... light - as - a - feather , perfectly balanced in your hand ( because of the Zephyr - Light magnesium body construction , and redesign of optical parts ) . Incomparably brilliant and high- contrast image ( Balcote , the Bausch & Lomb ...
Page 277
... light in a theater spotlight , containing within itself all the dif- ferent colors — red , blue , green , etc. To throw a red light on the stage , you use a red filter which lets only the red rays pass through ; a blue one for a blue light ...
... light in a theater spotlight , containing within itself all the dif- ferent colors — red , blue , green , etc. To throw a red light on the stage , you use a red filter which lets only the red rays pass through ; a blue one for a blue light ...
Page 414
... light weight , and easy balance in the hand , the postwar Bausch & Lomb binocular offers performance surpassing any such in- strument previously built . Balcote , the Bausch & Lomb anti - reflection coating , reduces flare , increases light ...
... light weight , and easy balance in the hand , the postwar Bausch & Lomb binocular offers performance surpassing any such in- strument previously built . Balcote , the Bausch & Lomb anti - reflection coating , reduces flare , increases light ...
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