Front:
200-inch Hale Telescope
HE I GHT OF DOME: 135 FT. DIAME TER: 137 FT. WEIGHT: 1,000
TONS. WEI GH T OF TELESCOPE: A BOUT 500 TONS.
THE MIRROR, MOUNTED IN THE LOWER END OF THE TELESCOPE.
WE I GHED 20 TONS BEFORE GRINDING AND POL I SHING. 14 TONS
AF TER.
IT IS 200 INCHES LN DIAMETER. 24 INCHES THICK AT
THE EDGE. 20 INCHES THICK AT THE CENTER. THE UPPER
SURFACE OF THE MIRROR IS COVERED BY A THI N BUT BRIL•
LIANT CO AT OF ALUMINUM. IS CONCA VE AND FOCUSES THE
L I GHT OFA STAR IN THE SAME WAY ASA LENS. PC 10
MOUNT WILSON AND PALOMAR OBSERVATORIES PHOTOGRAPH.
E 4693
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ANGELENO PHOTO SERVICE - 1030 SO. ALVARADO, L. A. 6, CALIF.-2
PHOTO POST CAR
