The person in front helps to propel the boat with hand levers
which are connected with rods to sprocket wheels on each side of
the platform. The occupant of the rear seat contributes his part
of the power with his feet on pedals of the shaft that carries the
sprocket wheels. This shaft and sprocket wheels drive the paddle
wheel by side chains of the bicycle kind. The boat is steered from
the rear seat by ropes attached to double rudders. This boat will
run at considerable speed and is very steady in rough water as it
goes directly through large waves instead of going over them.
--Contributed by Ernest Schoedsack, Council Bluffs, Iowa.
** How to Make a Lead Pencil Rheostat [145]
Take an ordinary lead pencil and cut seven notches at equal
intervals on the pencil down to and around the lead, leaving it
bare. A seven-point switch is constructed on a board of suitable
size making the points by using screws that will go through the
board. A small piece of tin or brass will do for a switch and is
fastened as shown. The connections are made on the back side of
the board as shown by the dotted lines.
Pages:
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359