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 207
ld calculate the length. The lamp that caststhe shadows of the lunar mountains is of course theSun; and we can find his position at any date fromthe Nautical Almanac or a similar book, and then wecan calculate the length of shadow if we knowhow high the mountain is; or, if we measure thelength of… … Fig- 55- little experiment. Here is a rough model of a lunarmountain attached to a flat board, and from thelantern, which represents the Sun, we will cast ashadow on the board. But now the board is madeup of two pieces hinged together, and if I slope theouter piece a little, you will see how the…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
