Page 386 - 89 history of astronomy_opt

ble the distance between the star images in
the focal plane. Such an instrument has
long been established at Oxford, and Ger-
man astronomers have made great use of
it. But in the hands of Sir David Gill (late
His Majesty’s Astronomer at the Cape of
Good Hope), and especially in his great re-
searches on Solar and on Stellar parallax, it
has been recognised as an instrument of the
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