The improvement over the customary forms of the Nichols radiometer consists in the reduction of the moment of inertia of the rotating system to such a value that the system has a period of eight seconds and a sensitivity equal to that of the thermopile or bolometer under their best working conditions. A comparison of the thermopile and the radiometer is given.

© 1922 Optical Society of America

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  1. Ann. der Physik,  60, p. 402; 1897.

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Ann. der Physik,  60, p. 402; 1897.

Ann. der Physik (1)

Ann. der Physik,  60, p. 402; 1897.

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