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 72
the pointC. We must measure the lengthof the base AB with this tape measure, and we willmake it just 12 feet, putting the other telescope at Bjust 12 feet from A. Instead of telescopes, however,through which only one person can look at a time,we will have small searchlights which will make… … 52 A VOYAGE IN SPACE off at 6 feet, 12 feet, 18 feet, and so on, from A : andyou will be able to see on which of these the light falls-But I want one of my young friends to turn his backon the screen so that he cannot see where the lightfalls : all he can now see is the amount of squint marked on…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
