Chapter III: TECHNOLOGY.--The Achison Stone Cutting Machine. 1 engraving.--The

Deep Mines of the World.--Shoemakers' Wax.--Gruber's New Method of Germination. 1 engraving.--Improved Process for Treating Wood, etc., for Paper Manufacture.--Bronzing Plaster of Paris Casts.--Sal Soda for Unhairing Hides and Skins.--Sieburger's Paste.--To Tan Lace Leather with Softsoap.

Practical Dyeing Recipes: Blue white zephyr, Scotch blue on worsted, Scotch green on worsted, jacquineaux on worsted, drab on worsted, gold on venetian carpet yarn, red brown slubbing, scarlet braid, slate braid, light drab on cotton, blue on cotton, brown on cotton, chrome orange on cotton carpet yarn, black on common mixed carpet yarn for filling, black on cotton and wool mixed yarn.

Damar Varnish for Negatives.--To Make Vignetters by Means of Gelatino-Chromate.--Resorcine Colors.--Phosphate Soaps.--Substitution of Different Metals in Ultramarine Colors.--A Harmless Green for Paper Hangings.--Siegwart's Bath for Etching Glass.--Composition of French Bronzes.--A New Enemy to the Tea Plant.--The Bradford Oil Sand.