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.

It should register about 40 deg. with an actinometer used to test silver solutions.

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

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

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.

From Scientific American Supplement, No. 492, June 6, 1885 by Various