do not hold their pens correctly and write for long spells day after
day. The break-down which happens in them is called "writer's cramp,"
but it is a disaster of the same kind as that which overtakes the foot
when its arch collapses, and its utility as a lever is lost.

FOOTNOTES:

[Footnote 1: From _The Engines of the Human Body_, Chapters VI and VII.
J.B. Lippincott Company, Philadelphia, 1920; Williams and Norgate,
London, 1920.]




THE EXPOSITION OF A MACHINE

THE MERGENTHALER LINOTYPE[2]

_Philip T. Dodge_


The Mergenthaler Linotype machine appeared in crude form about 1886.
This machine differs widely from all others in that it is adapted to
produce the type-faces for each line properly justified on the edge of a
solid slug or linotype.

These slugs, automatically produced and assembled by the machine, are
used in the same manner as other type-forms, whether for direct printing
or for electrotyping, and are remelted after use.