Sentence Examples with the word Heliostat

One of the most important applications of the heliostat is as an adjunct to the newer forms of ' horizontal telescopes (q.v.) and in conjunction with spectroscopic telescopes in observations of eclipses.

In the absence of a heliostat it is more convenient to obtain a point of light with the aid of a lens of short focus.

In the absence of a heliostat the latter was the more convenient.

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Silbermann's heliostat reflects the rays in any direction.

Foucault's heliostat reflects the rays horizontally in any required direction.