The Encyclopedia Americana: A Library of Universal Knowledge ...Encyclopedia Americana Corporation, 1924 |
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Zadetki 1–5 od 100
Stran 11
... various standard can- dles cannot , owing to the inconstancy of the latter , be said to exist . Since , however , candle- power is still the term according to which nearly all artificial sources of light are rated it has been found ...
... various standard can- dles cannot , owing to the inconstancy of the latter , be said to exist . Since , however , candle- power is still the term according to which nearly all artificial sources of light are rated it has been found ...
Stran 12
... various sources used in artificial lighting is far from uniform and it is necessary , therefore , in order to give a complete description of the lighting power of any source , to determine the intensity of the source as viewed from all ...
... various sources used in artificial lighting is far from uniform and it is necessary , therefore , in order to give a complete description of the lighting power of any source , to determine the intensity of the source as viewed from all ...
Stran 13
... various directions must further be reduced in the ratio of the sine of the angle between the direction of view and the vertical , and this is done by the interposition of glasses which are smoked until they transmit the desired ...
... various directions must further be reduced in the ratio of the sine of the angle between the direction of view and the vertical , and this is done by the interposition of glasses which are smoked until they transmit the desired ...
Stran 14
... various parts , as shown in Fig . 2 , is very effective . Ground Glass Camera Bellows Shutter Microscope Abbe Condenser Filter Diaphragm Filter Condenser Cooler Condenser Light FIG . 2. Relative positions of the various points . Consult ...
... various parts , as shown in Fig . 2 , is very effective . Ground Glass Camera Bellows Shutter Microscope Abbe Condenser Filter Diaphragm Filter Condenser Cooler Condenser Light FIG . 2. Relative positions of the various points . Consult ...
Stran 19
... various pathogenic organisms , some- times within a single hour . Sunlight is thus an important disinfectant . The sterilizing in- fluence of light in the purification of water and sewage has been repeatedly proved ( see STER- ILIZATION ) ...
... various pathogenic organisms , some- times within a single hour . Sunlight is thus an important disinfectant . The sterilizing in- fluence of light in the purification of water and sewage has been repeatedly proved ( see STER- ILIZATION ) ...
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