IN MANUFACTURES, ARTS, AND DOMESTIC ECONOMY. EDITED BY EDWARD ANDREW PARNELL, 66 AUTHOR OF ELEMENTS OF CHEMICAL ANALYSIS," LATE ASSISTANT CHEMICAL MANUFACTURE OF GLASS. STARCH. TANNING. CAOUTCHOUC; ITS PROPERTIES AND APPLICATIONS. BORAX AND THE BORACIC LAGOONS. SOAP. SULPHUR AND SULPHURIC ACID. SODA MANUFACTURE. LONDON: PRINTED FOR TAYLOR AND WALTON, UPPER GOWER STREET. 1844. TABLE OF CONTENTS. FAGE § I. HISTORY OF THE GLASS MANUFACTURE Pliny's account of the invention of glass.-Glass-works of Sidon, Alexandria, and Rome. — Portland or Barberini vase. -Glass- making introduced into Venice. - Progress of glass-making in Invention of cast plate-glass.-St. Gobin glass-works.—Glain neidyr Physical properties of glass.-Properties of the constituents of glass. -Silicic acid.-Silicates of the alkalies.-Soluble glass.-Silicate of lime.-Silicate of alumina.-Silicates of lead.-Silicates of iron. § IV. DETAILS OF THE MANUFACTURE OF GLASS Glass-houses.-Glass-pots Flint-glass. Flint-glass house and pots.- Materials for making sidiary furnaces.—Materials employed in making crown-glass.— Plate-glass.-Materials for making plate-glass.-Ravenhead plate- - Striæ, knots, threads and tears.—How to obtain uniform glass.— Metallic oxides used for colouring glass.—Protoxide and suboxide of copper.- Peroxide and protoxide of iron.-Oxide of cobalt.- Oxide of chromium.-Oxide of manganese.-Oxide of gold.- § II. PREPARATION OF STARCH FROM THE CEREALS Composition of wheat.-Preparation of starch from ground wheat by fermenting process.-"Boxing" and drying of starch.—Prepara- tion of starch from dough, by washing.-Preparation of starch § III. PREPARATION OF STARCH FROM RICE Composition of rice.-Separation of gluten from rice by an alkali; |