Schellbach, Carl Heinrich. **E.Cab.135.3 A series of figures illustrative of geometrical
optics, together with an explanation forming a treatise translated from the German of Professor Schellbach. Edited with notes end an appendix, by W. B. Hopkins. Cambridge: |Eng.| . J. Deighton. 1851. Text, iv, 56 pp. 8°. Atlas, 14 plates. F°, oblong.
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