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.
A Johnson's actinometer is very useful to time the exposure.
From Photogravure by Blaney, Henry R.
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 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
We can, however, by chemical means arrive at an exact estimate of the active power, and for this purpose an actinometer is used.
From Scientific American Supplement, No. 492, June 6, 1885 by Various
A very suitable instrument for timing the exposure of carbon tissue is Sawyer's actinometer.
From Photogravure by Blaney, Henry R.
