actinometer
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
With daylight, however, the light is constantly fluctuating, and this renders the use of an actinometer a necessity for correct exposure.
From Wireless Transmission of Photographs Second Edition, Revised and Enlarged 1919 by Marcus J. Martin
The actinometer indicated an exposure of thirty seconds where in good light one would be right.
From Scientific American Supplement, No. 492, June 6, 1885 by Various
The actinometer consists of a large cylindrical thermometer bulb, with a scale considerably lengthened, so that minute changes may be easily seen.
From A Treatise on Meteorological Instruments Explanatory of Their Scientific Principles, Method of Construction, and Practical Utility by Henry Negretti
It should register about 40 deg. with an actinometer used to test silver solutions.
From Photogravure by Henry R. Blaney
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.
From Sounding the Ocean of Air by A. Lawrence Rotch
