The text only version is of limited use because of the widespread
occurrence of diagrams and illustrations. Use the pdf version for
the complete text.

Many projects are of contemporary interest--magic, kites and
boomerangs for example. Try a "Querl" for starters.

There are many projects of purely historical interest, such as
chemical photography, phonographs, and devices for coal
furnaces.

Another class of projects illustrate the caviler attitude toward
environment and health in 1913. These projects involve items
such as gunpowder, acetylene, hydrogen, lead, mercury, sulfuric
acid, nitric acid, cadmium, potassium sulfate, potassium cyanide,
potassium ferrocyanide, copper sulfate, and hydrochloric acid.
Several involve the construction of hazardous electrical devices.
Please view these as snapshots of culture and attitude, not as
suggestions for contemporary activity.

Be careful and have fun or simply read and enjoy a trip into
yesterday.


[Illustration: How to Make a Glider (See page 171)]


THE BOY MECHANIC

VOLUME I