Abstract
II.
WHETHER the telescope be of the first or last order of excellence, its light-grasping powers will be practically the same; there is therefore a. great distinction to be drawn between the illuminating and defining power. The former as we have seen depends upon size (and subsidiarily upon polish), the latter depends upon the accuracy of the curvature of the surface.
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LOCKYER, J. The Modern Telescope 1 . Nature 17, 125–127 (1877). https://doi.org/10.1038/017125a0
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DOI: https://doi.org/10.1038/017125a0