Mix a rather weak solution of clear aniline dye of the
desired color and dip the plate in it, wiping the plate side
clean. If not dark enough, dip again and again until desired tint
is attained, letting it dry between each dipping. A very light
blue tint slide will brighten a yellow film considerably, but the
tint must be very light, just a bare tint.
** A Bicycle Catamaran [145]
The accompanying photographs show a bicycle boat made to carry two
persons.
[Illustration: This Catamaran Carries Two People]
This boat is constructed by using two galvanized iron tubes 18 ft.
long and 12 in. in diameter, tapered at the front end down to
cast-iron points, and the rear end shaped to attach rudders. These
tubes are placed 26 in. apart, giving the boat an extreme width of
50 in.
The cylinders support a platform and on the rear end of this
platform is constructed a paddle wheel 52 in. in diameter with 16
spokes. On the end of each spoke is fastened a galvanized sheet
metal blade 6 in. wide and 8 in. long. A large guard placed over
the paddle wheel forms a seat for one person and a chair in front
on the platform provides a place for a second person.
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