Alvan Clark (March 8, 1804 – August 19, 1887), born in Ashfield, Massachusetts, was an American astronomer and telescope maker. He started as a portrait...

Alvan Graham Clark (July 10, 1832 – June 9, 1897) was an American astronomer and telescope-maker. Alvan Graham Clark was born in Fall River, Massachusetts...

42°21′19″N 71°06′33″W / 42.35528°N 71.10927°W / 42.35528; -71.10927 Alvan Clark & Sons was an American maker of optics that became famous for crafting...

he was the son of Alvan Clark, part of a family of refracting telescope makers in the 19th century. In 1846, George Bassett Clark joined his father and...

features of the observatory is the 8.25" Alvan Clark Telescope, which dates back to the late 19th century. Alvan Clark & Sons were renowned telescope makers...

named for American astronomer and telescope maker Alvan Clark and his son Alvan Graham Clark. Clark has a narrow inner wall, and thus a wide interior...

ISBN 9780819463074. Warner, Deborah Jean; Ariail, Robert B. (1995). Alvan Clark & Sons, Artists In Optics (2nd ed.). Willmann-Bell. p. 174. Kidger, M...

observing Venus in detail in mid-1896 soon after the 61-centimetre (24-inch) Alvan Clark & Sons refracting telescope was installed at his new Flagstaff, Arizona...

as the basis for the Double-Gauss lens first proposed in 1888 by Alvan Graham Clark, which is a four-element, four-group compound lens that uses a symmetric...

ast.cam.ac.uk. Retrieved 2019-03-07. "Objekt des Monats: Refraktor von Clark & Sons". bibliothek.univie.ac.at. "Astronomy Program – Jewett Observatory"...

world. It is currently used for public education programs. The 1904 Alvan Clark & Sons 16 inch refractor – Housed in the "Herget Building". Used in public...

telescopes in astronomy. Noted lens makers of the 19th century include: Alvan Clark Brashear Chance Brothers Cauchoix Fraunhofer Gautier Grubb Henry Brothers...

Paris, France by Mantois and delivered to Alvan Clark & Sons in Massachusetts where they were completed. Clark then made what would be the largest telescope...

Percival Lowell in the observer's chair of the Alvan Clark 61 cm (24-inch) refractor Historic Clark telescope installed in 1896 and housed in a wooden...

1841 Alvin Clark Owsley, member of the Twenty-first Texas Legislature Alvan Clark, nineteenth-century astronomer and telescope-maker Alvan Clark & Sons Disappearance...

inception in 1890. The telescope is the largest Alvan Clark refractor still mounted on its original Alvan Clark mount. List of astronomical observatories List...

William Pickering of Harvard University, along with telescope-maker Alvan Clark, prepared an experiment with 4-and-13-inch (102 and 330 mm) telescopes...

College for its new Smith Observatory and had a 9.5-inch lens made by Alvan Clark & Sons. Among the notable instruments the company built were the telescopes...

knowledge mostly through self-education. In 1873, he took a job with the Alvan Clark and Sons Company producing telescopes in Cambridge, Massachusetts, which...

at the observatory was a 12-inch (300-millimeter) refractor made by Alvan Clark. Astronomer E. E. Barnard used the telescope to make "exquisite photographs...

was not in use as of 2009. The Alvan Clark Telescope is a 13 in (33 cm) refractor named after its maker, Alvan Clark. The telescope was first installed...

public on weekends. "Leah" is an 8" refractor telescope built in 1883 by Alvan Clark & Sons and donated by Anthony Chabot. "Rachel" is a 20" refractor telescope...

Observatory boasted an 8¼ inch (210mm) aperture refracting telescope built by Alvan Clark of America. He was one of the founders of the British Astronomical Association...

Wray. On January 31, 1862, American telescope-maker and astronomer Alvan Graham Clark first observed the faint companion, which is now called Sirius B,...

Great Refractor". www.cfa.harvard.edu. Retrieved September 8, 2019. "Fitz/Clark 12-in Refractor". The General History of Astronomy. Cambridge University...

observatory. The first telescope in the building was an eight-inch (200 mm) Alvan Clark. The observatory is still used by the astronomy classes and is open to...

vacationing in the town at the time), Alvan Clark, nineteenth century astronomer and telescope maker, and William S. Clark, member of the Massachusetts Senate...

Tennessee, United States. The Observatory has an 1897 vintage 6 inch Alvan Clark refractor located in the main dome and several other telescopes that...

adding a meniscus lens to its single convex and concave lens design. Alvan Clark further refined the design in 1888 by taking two of these lenses and...

instruments of the highest quality, including an 81⁄4-inch refractor by Alvan Clark & Sons and a 3-inch (7.6 cm) Fauth transit circle. Shortly after the...