. Carnegie Institution of Washington publication. THE SNOW TELESCOPE. A step in this direction was the horizontal tele- scope, which the late Miss Snow had presented to the Yerkes Observatory through the kind interest and assistance of Dr. George S. Isham. It con- sists of a coelostat, with a plane mirror 30 inches in diameter, rotated by clockwork at such a rate. FIG. 8.—Coelostat and second mirror of Snow Telescope. as to keep the beam of sunlight, reflected from its silvered (front) surface, in a fixed position on a second plane mirror standing above and south of it. From this mirror the be
. Carnegie Institution of Washington publication. THE SNOW TELESCOPE. A step in this direction was the horizontal tele- scope, which the late Miss Snow had presented to the Yerkes Observatory through the kind interest and assistance of Dr. George S. Isham. It con- sists of a coelostat, with a plane mirror 30 inches in diameter, rotated by clockwork at such a rate. FIG. 8.—Coelostat and second mirror of Snow Telescope. as to keep the beam of sunlight, reflected from its silvered (front) surface, in a fixed position on a second plane mirror standing above and south of it. From this mirror the beam is reflected nearly horizontally to a point 100 feet north, where it falls on a 24-inch concave mirror of 60 feet focal length, which forms a solar image about 6l/i inches. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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