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 241
usthrow a picture of them on the screen. We firstplace a bar magnet on this sheet of glass and then 220 A VOYAGE IN SPACE pepper some iron filings all over the glass. Theydo not go into a pattern at once, because even thesmooth glass is not quite smooth; but if we tapthe glass gently so as to make… … Fig. 63.—The same Spot as in Fig. 62, but photographed inHydrogen light. among these iron filings some filings of silver orother non-magnetic substance, the silver wouldnot feel the pull of the magnet. Mr. W. S. Gilbertmade a pretty song about the silver churn if3^011 remember, in his opera…
Astronomy -- Juvenile literature
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
