Take a life-size picture of a man in a full-bottomed wig, or a lady in a
head-dress with head and shoulders only shown, and, having cut out the
face and all the background, glue it to the back of a looking-glass,
from which you have scraped away all the quicksilver just where this
cut-out picture goes.
Undertake to show any one his forefather, or her ancestress, as the case
may be, in their habiliments as they lived, and, on standing before the
mirror, their face will be reflected in the vacant place.
[Illustration: Fig. 127.]