Workers of Speculum

  • Neil English
Part of the Historical & Cultural Astronomy book series (HCA)


In the last chapter, we explored the rise of the long focal length, non-achromatic refractors, containing a singlet objective lens and how, though unwieldy and difficult to use, skilled observers were able to use them to push back the frontiers of knowledge, showing humankind that the universe was vastly more complicated and interesting than anyone had dared imagine before. But even in these early days of telescopic astronomy, there were many who already felt that there must be better ways to bring the universe closer, more convenient contrivances to explore the heavens. This quest led some to consider the properties of mirrors rather than lenses.


  1. Bell, L.: The Telescope. Dover, New York (1981)Google Scholar
  2. English, N.: Choosing and Using a Dobsonian Telescope. Springer, New York (2011)Google Scholar
  3. Hall, R.: Isaac Newton: Adventurer in Thought. Cambridge University Press, Cambridge (1999)zbMATHGoogle Scholar
  4. Hockey, T.: The Biographical Encyclopedia of Astronomers. Springer, New York (2009)Google Scholar
  5. King, H.C.: The History of the Telescope. Dover, New York (1955)Google Scholar
  6. Newton’s Reflecting Telescope as presented by Professor Martyn Poliakoff at the Royal Society, London.
  7. North, J.: The Fontana History of Astronomy and Cosmology. Fontana Press, London (1994)Google Scholar
  8. Pliny the Elder: Natural History: A Selection. Penguin Classics, New York (1991)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Neil English
    • 1
  1. 1.Fintry by GlasgowUK

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