The volumes of the International Library of Technology are made up
of Instruction Papers, or Sections, comprising the various courses
of instruction for students of the International Correspondence
Schools. The original manuscripts are prepared by persons thoroughly
qualified both technically and by experience to write with authority,
and in many cases they are regularly employed elsewhere in practical
work as experts. The manuscripts are then carefully edited to make
them suitable for correspondence instruction. The Instruction Papers
are written clearly and in the simplest language possible, so as to
make them readily understood by all students. Necessary technical
expressions are clearly explained when introduced.
The great majority of our students wish to prepare themselves for
advancement in their vocations or to qualify for more congenial
occupations. Usually they are employed and able to devote only a few
hours a day to study. Therefore every effort must be made to give
them practical and accurate information in clear and concise form and
to make this information include all of the essentials but none of
the non-essentials. To make the text clear, illustrations are used
freely. These illustrations are especially made by our own Illustrating
Department in order to adapt them fully to the requirements of the text.
In the table of contents that immediately follows are given the titles
of the Sections included in this volume, and under each title are
listed the main topics discussed. At the end of the volume will be
found a complete index, so that any subject treated can be quickly
found.