Peck, William G. (William Guy), 1820-1892 · New York, Chicago, A. S. Barnes & company · leaf 27
lecting telescopes. An example of this species of telescope is shown in Fig. 7,which represents the great silver-on-glass reflector at theParis observatory. It consists of a tube about 25 feet long,at the bottom of which is a curved mirror nearly 4 feet in 22 ASTRONOMY. diameter. The reflected… … Fig. 7. Great silver-on-glass Reflector of the Paris Observatory. This instrument is equatorially mounted, that is, itmay be turned around either of two axes, one of which isparallel to the axis of the heavens, and the other to the PRELIMINARY PRINCIPLES. 23 plane of the equinoctial. The former,…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
