his loyalty, and again warning him to be on his guard.

In the meanwhile, work went on rapidly on the Wizard Camera.
Briefly described it was a small square box, with a lens
projecting from it. Inside, however, was complicated machinery,
much too complicated for me to describe. Tom Swift had put in his
best work on this wonderful machine. As I have said, it could be
worked by a storage battery, by ordinary electric current from a
dynamo, or by hand. On top was a new kind of electric light. This
was small and compact, but it threw out powerful beams. With the
automatic arrangement set, and the light turned on, the camera
could be left at a certain place after dark, and whatever went on
in front of it would be reproduced on the moving roll of film
inside.

In the morning the film could be taken out, developed, and the
pictures thrown on a screen in the usual way, familiar to all who
have been in a moving picture theatre. With the reproducing
machines Tom had nothing to do, as they were already perfected.
His task had been to make the new-style camera, and it was nearly
completed.

A number of rolls of films could be packed into the camera, and
they could be taken out, or inserted, in daylight. Of course
after one film had been made, showing any particular scene any
number of films could be made from this "master" one. Just as is
done with the ordinary moving picture camera. Tom had an
attachment to show when one roll was used, and when another
needed inserting.