Robson, William: Grammigraphia; or the Grammar of Drawing. (London, 1799)

101

I

Of the Subject for Reality.

AT is cut out for the purpose of altering to
each Situation. It may be untied, taken out, and
placed on a book, or something to elevate it con-
veniently for observation; and by opening the two
leaves it will admit of this perpendicular manner in
which it should stand : but, if it is preferred, this
subject may remain in the book, and may with
convenience be held perpendicularly. The move-
able parts are then to be disposed according to the
instructions given with the Five following Descrip-
tions of the Appearance, and should be held in
their proper Situation while the observation is
made. Care also should be particularly taken
that the eye be kept in the right place, this
being the very occasion of the Appearance to be
examined; and the spot with the word " Eye"
in the Position to be observed, will direct to
the place where it should be situated in the Subject
for Reality. There will be no occasion to look
very near, but as much as possible opposite to
the spot.

L2