Soap Bubbles
and the Forces which Mould Them
Forfatter: F. R. S., A. R. S. M., C. V. Boys
År: 1890
Serie: Romance of Science Series
Sted: London
Sider: 178
UDK: 532
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14° SOAP-BUBBLES, AND
of the dye about as large as a mustard-seed
will be enough for a large wine-glass. The
sides of the glass should be wetted with the
wine.
Cat-Boxes.
Every school-boy knows how to make these.
They are not the boxes made by cutting slits
in paper. They are simply macle by folding,
and are then blown out like the “ frog,” which
is also macle of folded paper.
Liquid Beads.
Instead of melting gold, water rolled on to
a table thickly dusted with lycopodium, or
other fine dust, or quicksilver rolled or thrown
upon a smooth table, will show the difference
in the shape of large and small beads perfectly.
A magnifying-glass will make the difference
more evident. In using quicksilver, be care-
ful that none of it falls on gold or silver coins,
or jewellery, or plate, or on the ornamental
gilding on book-covers. It will do serious
damage.