The artists repository and drawing magazine: exhibiting the principles of the polite arts in their various branches (3.1789)

IV

PREFACE.
The certainty of such success will be
secured, if the Reader attends to the fol-
lowing rules. I. To understand one pro-
portion or scheme before he proceeds to
another. II. Where any object not en-
graved is- mentioned (for to engrave every
objebt would be endless) the Reader is
advised to inspecl one as near as possible
to that deicribed : as for instance, in the
hrsl Lecture, a square table with a Iheet
os writing-paper laid on it, will exemplisy,
with a force and accuracy not otherwise to
be attained, not only the nature of planes,
but the inserences there drawn ; ana so of
others.
It is common to admit in Perspective
Treatises, many difficult subjefts of mere
curiolity ; those who may be pleased with
such subjects, are requeued to suppose it
was in the Author’s power to insert them;
but if they recollect the popularity at
which he has aimed, they will see the pro-
priety of their omissiom

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