. 1 10. 3.—EFFECT OF A RE.^GENT blA E-bLACK IRoN-GALl. INKS OF THE SA>IE TYPE IX WRITING OF 1909 AND 1921. ink showing progressivelv diminishing intensity of colour from the top to the bottom of the page. It is needless to add that the register's genuineness was not established. REFERENCES Forensic Chemistry. By A. Lucas. (Arnold, i6>.) Inks : their Composition and Manufacture. 2nd Edition. By C. Ainsworth Mitchell and T. C. Hepworth. (Griiifin, 9s.) Documents and their Scientific Examination. By C. Ainsworth Mitchell. (Griffin, los. (>d.) (An article by the same author on Pencil
. 1 10. 3.—EFFECT OF A RE.^GENT blA E-bLACK IRoN-GALl. INKS OF THE SA>IE TYPE IX WRITING OF 1909 AND 1921. ink showing progressivelv diminishing intensity of colour from the top to the bottom of the page. It is needless to add that the register's genuineness was not established. REFERENCES Forensic Chemistry. By A. Lucas. (Arnold, i6>.) Inks : their Composition and Manufacture. 2nd Edition. By C. Ainsworth Mitchell and T. C. Hepworth. (Griiifin, 9s.) Documents and their Scientific Examination. By C. Ainsworth Mitchell. (Griffin, los. (>d.) (An article by the same author on Pencil Pigments in Writing will appear in the January number.)
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