p. 78 and 79

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(right page) 79

New mode of applying Black Lead in
Drawings.-The instruments required are,
a small piece of muslin, filled with black
lead reduced to fine powder which is
called a shader; a palette made of
thick card hoard; and a brush of
moderate rise. The shader is [subtedtive?] or three times on the palette, near one extremity, by which an unall portion of the lead is rifted as it were, though the muslin; the brush is passed sound in the pulverized graphite and on some other parts to adjust the shades [illegible] the brush is then applied to the papers to produce a sky, or other expance of shade, with a circlating motion to produce a darker shade, the graphite may be rubbed with alder pith, or any number substance, brought to a paint.
[Lamerols?] Edn Journ. of Science Jan 1827.