Salmon, William: Polygraphice; Or, The Art of Drawing, Engraving, Etching, Limning, Painting, Washing, Varnishing, Colouring and Dying: In Three Books ... (London, 1672)

88 Folygraphices. Lib. II.
help of sharp pointed and cutting In-
struments.
/
II. The chies Inftruments are sour,
i. Gravers, 2. An Oy 1 ftone, 3. A Cu-
(hion, 4. Aburniftier.
III. Gravers are of three forts, round
pointed 3 (quare pointed, and Lozeng
pointed. The round is bejl to fcratch
with all: the square graver is to make the
largeji jlrokes : the Lozeng is to make
jlrokes more fine and delicate : But a gra-
ver os a middle fize betwixt the square'
and Lozeng pointed^ will make the jlrokes
or hatches floow with more life and
'vigour s according m you manage it in
working,
I VY The Oyl-stone is to whet the
Gravers upon, which muft be very
fmooth, not too soft, nor too hard, and
without pinholes. <
The ufe is thus: put a few drops os oj\
Olive upon the jlonc^ and laying that side
of it0 (which you intendffiall cut the Cop-
per J ssat upon the jloneP whet it very flat
and even j and therefore he jure to carry
our handfiedfajl with an equal jlrength0
pla*