A voyage in space; a course of six lectures "adapted to a juvenile auditory" delivered at the Royal Institution at Xmas 1913 (1915)
Turner, Herbert Hall, 1861-1930 · London Society for Promoting Christian Knowledge · leaf 124
r bends them back again without undoing the colour entirely. That is a new and valuable idea, that one bending can balance another and yet the colour effects do not balance, because it suggests to us at once that we ought to be able to do just the opposite, that is to balance the colour effects and… … M/RROR Fig. 28. 104 A VOYAGE IN SPACE ceeded in making lenses larger and larger until thelargest is now 40 inches wide—the great lens at theYerkes Observatory near Chicago. That is a longway short of the largest mirror telescope (you re-member that Lord Rosses was six feet wide); butit is far…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
