Alvan Clark and Sons Artists in Optics

Deborah Jean Warner

Editore: Forgotten Books
Formato: PDF
Testo in en
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Dimensioni: 9,19 MB
  • EAN: 9780243822904
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Descrizione
Clarks made the objectives for the largest refracting telescopes in the world; and the fifth of their efforts, their 40-inch lens at the Yerkes Observatory, has never been surpassed. Their optical work, which was recognized as unexcelled anywhere in the world, was the first significant American contribution to astronomical instrument making. American telescopes had been made before, but none compared to those of Euro pean manufacture; by the end of the 19th century, however, partly because of the example set by Alvan Clark Sons, several other Ameri cans were making fine astronomical instruments.