| 单词 | actinometer |
| 例句 | A very suitable instrument for timing the exposure of carbon tissue is Sawyer's actinometer. Photogravure 2011-06-19T02:00:24.663Z The actinometer consists of a large cylindrical thermometer bulb, with a scale considerably lengthened, so that minute changes may be easily seen. A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles, Method of Construction, and Practical Utility 2011-06-19T02:00:15.717Z The actinometer of M. Violle is, in principle, a sphere of copper, blackened externally, and having inside a thermometric apparatus which registers some distance away. Sounding the Ocean of Air 2011-05-31T02:00:35.603Z With daylight, however, the light is constantly fluctuating, and this renders the use of an actinometer a necessity for correct exposure. Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 Another object was, to bring down specimens of air from different altitudes, for analysis; to try the effect of the actinometer at great elevations; and to note the hygrometric condition. Chambers's Edinburgh Journal, No. 456 Volume 18, New Series, September 25, 1852 A Johnson's actinometer is very useful to time the exposure. Photogravure 2011-06-19T02:00:24.663Z The mystery was not a new type of infernal machine as they imagined but merely a home-made actinometer! Sixteen Months in Four German Prisons Wesel, Sennelager, Klingelputz, Ruhleben When you get home, the first thing to do is to get hold of a paint box and paint the underside of the glass of your actinometer to match the darkened paper. Scientific American Supplement, No. 492, June 6, 1885 Then note down everything you have done—kind of view, stop, speed of plate, exposure of each plate, and length of exposure of actinometer. Scientific American Supplement, No. 492, June 6, 1885 You may sometimes find that the actinometer indicates a very different exposure from what the eye would lead you to expect. Scientific American Supplement, No. 492, June 6, 1885 We can, however, by chemical means arrive at an exact estimate of the active power, and for this purpose an actinometer is used. Scientific American Supplement, No. 492, June 6, 1885 The actinometer indicated an exposure of thirty seconds where in good light one would be right. Scientific American Supplement, No. 492, June 6, 1885 |
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