Alvan Clarke 8” refractor from 1878, still in use by Skyscrapers, Inc in RI : r/telescopes
Alvan Graham Clark (1832-1897) - Find a Grave Memorial
Selecting Our Meade LX200 - Frosty Drew Observatory & Sky Theatre
Alvan Graham Clark - Wikipedia
Alvan Clark & Sons - Wikipedia
Post a Photo of a Historic Telescope - Page 8 - Classic Telescopes - Cloudy Nights
5" Clark refractor from John Briggs' collection
J. B. ALLEN, Springfield Mass. Early American monocular microscope, c. 1858
Big Cigar Gallery
Post a Photo of a Historic Telescope - Page 7 - Classic Telescopes - Cloudy Nights
12-Inch Alvan Clark Telescope Restoration:
William Optics66SD vs. Televue Pronto/Ranger - Refractors - Cloudy Nights
9" F/18 "Jumbo" - Stallion Springs, Ca - Photo Gallery - Cloudy Nights
400 Years of the Telescope
The Alvan Clark telescope at Seagrave Observatory, circa late 1960s
Using a 26" Clark - Refractors - Cloudy Nights
400 Years of the Telescope
Selecting Our Meade LX200 - Frosty Drew Observatory & Sky Theatre
HALL OF MIRRORS - The Public "I"
1891 10" Alvan Clark F15 Telescope - Classic Telescopes - Cloudy Nights
Alvan Clark refractor? - Classic Telescopes - Cloudy Nights
Movers | Nature
Alvan Clark & Sons - Wikipedia
ALVAN CLARK (1804-1887),GEORGE BASSETT CLARK (1827-1891)AND ALVAN GRAHAM CLARK
Selecting Our Meade LX200 - Frosty Drew Observatory & Sky Theatre
