The Reader's Digest, Volumen77,Parte1DeWitt Wallace, Lila Acheson Wallace Reader's Digest Association, 1960 |
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Página 135
... light- gathering ) , the owl's eye is packed tight with rod cells only . These con- tain a remarkable chemical known as " visual purple , " which converts even a glimmer of light into a chem- ical signal , giving the bird an actual ...
... light- gathering ) , the owl's eye is packed tight with rod cells only . These con- tain a remarkable chemical known as " visual purple , " which converts even a glimmer of light into a chem- ical signal , giving the bird an actual ...
Página 226
DeWitt Wallace, Lila Acheson Wallace. Experts in light and lenses specify Foster Grant Sunglasses Light meter test of ff 77 Lens proves uniform filter factor screens out maximum glare . Admits maximum detail . EC The light meter reacts ...
DeWitt Wallace, Lila Acheson Wallace. Experts in light and lenses specify Foster Grant Sunglasses Light meter test of ff 77 Lens proves uniform filter factor screens out maximum glare . Admits maximum detail . EC The light meter reacts ...
Página 34
... light directly on the altimeter and directed the beam of a second light on two switches , each covered by a safety guard . Carefully he lifted the guards and eased two fingers over the switches beneath them . When the gondola struck the ...
... light directly on the altimeter and directed the beam of a second light on two switches , each covered by a safety guard . Carefully he lifted the guards and eased two fingers over the switches beneath them . When the gondola struck the ...
Contenido
Dr Charles Malik | 37 |
Senator Thomas J Dodd | 83 |
Latin American Report | 112 |
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