A popular handbook and atlas of astronomy, designed as a complete guide to a knowledge of the heavenly bodies and as an aid to those possessing telescopes (1891)
Peck, William, Sir, 1862-1925 · New York, G. P. Putnam's Sons · leaf 161
rschel, reflecting telescopes were successfully constructed, but chiefly on theGregorian principle. This form oftelescope reached a high degree ofexcellence from the labours ofShort, the Edinburgh optician. In1732, Short turned his attentionto the construction of Gregorianreflectors, and in a very… … Fig. 29a. the first reflecting telescope, made by sir isaac newton. It is to Herschel, however, thatwe owe the general introduction ofthe reflecting telescope; for, as yet, no discoveries had been made by this form of instrument, and it was only by Herschels success thatthe reflector became…
Astronomy
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