A counterfeit should be compared with one that is genuine, in order
to familiarize one's self with the distinguishing features which have
already been indicated.
It is best to acquire the habit of giving each note as received a
searching glance, turning it over to see the back, and if there be
any defect, it will probably catch the eye. If there be the least
suspicion, a critical examination of all its parts should be made.
In case of doubt, the lathe work should be carefully examined, and it
may be compared with a perfectly good bill; then examine the shading
around the letters, and search for any sign of alteration in the
title or denomination of the note. If there are any medallion heads or
shields, notice the lines; if there is any red letter work, designed
to appear on both sides, look at the character of the work on the
face, then turn the note and examine the back. If the printing is
not exactly alike on both sides, but varies in any part the note is
counterfeit. Then observe the vignettes and portraits, to see whether
their style and perfection compare well with the work on genuine
notes. Then examine the solid print and engravers' names, as well as
the printing, ink, and paper. By such thorough examination, one can
hardly be at a loss to determine the status of the note.
Good magnifying glasses are necessary, in most instances, to bring out
the fine lines on bank-notes. Sometimes a microscope of great power is
required to discern the genuine line.