Publisher's Synopsis
Excerpt from On the Theory of the Matthews and the Russell-L�onard Photometers for the Measurement of Mean Spherical and Mean Hemispherical Intensities
We shall now pass on to a m01e complete discussmn of the problem of the number of mirrors and their positions on the arc, . With par ticular reference rather to the integrating photometer for incandescent lamps than to the instrument intended especially for are lamps since, as stated above, it was in connection with the design of an instrument of the former type for the Bureau of Standards that these computa tions were made.
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