INK MANUFACTURE: Including Writing, Copying, Lithographic, Marking, Stamping, and Laundry Inks. By Sigmund Lehner. Three Illustrations. Crown 8vo. 162 pp. Translated from the German of the Fifth Edition. Price 5s. net. (Post free, 5s. 3d. home; 5s. 6d. abroad.)

Contents.

Varieties of Ink -- Writing Inks -- Raw Materials of Tannin Inks -- The Chemical Constitution of the Tannin Inks -- Recipes for Tannin Inks -- Logwood Tannin Inks -- Ferric Inks -- Alizarine Inks--Extract Inks -- Logwood Inks -- Copying Inks -- Hektographs -- Hektograph Inks -- Safety Inks -- Ink Extracts and Powders -- Preserving Inks -- Changes in Ink and the Restoration of Faded Writing -- Coloured Inks -- Red Inks -- Blue Inks -- Violet Inks -- Yellow Inks -- Green Inks -- Metallic Inks -- Indian Ink -- Lithographic Inks and Pencils -- Ink Pencils -- Marking Inks -- Ink Specialities -- Sympathetic Inks -- Stamping Inks -- Laundry or Washing Blue -- Index.

SEALING-WAXES, WAFERS AND OTHER ADHESIVES FOR THE HOUSEHOLD, OFFICE, WORKSHOP AND FACTORY. By H. C. Standage. Crown 8vo. 96 pp. Price 5s. net. (Post free, 5s. 3d. home; 5s. 6d. abroad.)

Contents.

Materials Used for Making Sealing=Waxes -- The Manufacture of Sealing-Waxes -- Wafers -- Notes on the Nature of the Materials Used in Making Adhesive Compounds -- Cements for Use in the Household -- Office Gums, Pastes and Mucilages -- Adhesive Compounds for Factory and Workshop Use.