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.
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 Rotch, A. Lawrence
The mystery was not a new type of infernal machine as they imagined but merely a home-made actinometer!
From Sixteen Months in Four German Prisons Wesel, Sennelager, Klingelputz, Ruhleben by Mahoney, Henry Charles
A Johnson's actinometer is very useful to time the exposure.
From Photogravure by Blaney, Henry R.
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 Negretti, Henry
Then note down everything you have done—kind of view, stop, speed of plate, exposure of each plate, and length of exposure of actinometer.
From Scientific American Supplement, No. 492, June 6, 1885 by Various
