― ―, ―, quantitative estimation, 202 ― ―, statistics, 224 ―, resolving by water, 65 ―, Schultze’s method of isolating cellulose from, 21 ―, soaking, 107 ― splitting machine, 74 ―, steaming, 107 ― suitable for Ekman’s process, 73 ―, sulphide treatment, 67 ―, sulphurous acid processes, 70 ―, treating for paper, 64 Woods, pulp yield of, 77 Wool fibre, character, 31 Wove paper, 156 Wrapping paper, 104 Yankee machine, 164 Yaryan evaporator, 232 Young and Pettigrew’s acid process, 69 Yucca gloriosa fibre, 44, 46 Zinc chloride and cellulose, 13 LONDON: PRINTED BY WM. CLOWES AND SONS, LIMITED, STAMFORD STREET AND CHARING CROSS. ADVERTISEMENTS. [advertisement] GEO. & WM. BERTRAM, MAKERS OF EVERY DESCRIPTION OF MACHINERY IN CONNECTION WITH THE MANUFACTURE OF PAPER. ST. KATHERINE’S WORKS, SCIENNES, EDINBURGH, AND LONDON. [Illustration: _Gold and Silver Medals, Edinburgh International Exhibition, 1886._] [Illustration: _First-class Medal, London International Exhibition, 1862._] SPECIALTIES. Improved Paper Making Machines (nearly 100 at work). Presse Pâte Machines. Single Cylinder Machines. Patent Flat Strainers (over 200 at work). Special Strainer Plates. Kollergangs or Edge Runners. Angle and Square Paper Cutters. Slitting and Winding Machines. Web Glazing Calenders. Superior Chilled Rolls. Patent Cone Beater. Sheet and Boarding Calenders. Improved Damping Rolls. Patent Deckle for Wire Frames (Archibald and Purdie’s). Patent Wire Guide. Improved Pulp Engines. Direct Driving Gear for Pulp Engines. Pumps of All Kinds. Hydraulic Presses and Hoists. ALSO Steam Engines of all Classes, High-pressure. Condensing, or Compound, up to any indicated Horse-power, Over 300 at work. [/advertisement] [advertisement] BENTLEY & JACKSON, PAPER-MAKERS’ ENGINEERS, BURY, NEAR MANCHESTER, Makers of Rag Choppers, Dusters & Willows. Patent Rag Cutter, To Cut Rags or Bagging into pieces 1 inch square and upwards. Spherical & Cylindrical Revolving Rag Boilers. Improved Rag Engines. Paper-Cutting Machines. Ripping & Winding Machines. Presse Pâtes. Paper-Making Machines. Steam Engines. [Illustration: EDGE RUNNER.] MACHINE-MADE WHEELS AND PULLEYS. ESTIMATES ON APPLICATION. [/advertisement] [advertisement] M^cDougall’s Patent Steam Trap, SPECIALLY ADAPTED FOR PAPER-MAKERS. For ejecting automatically, without loss of steam, the water of condensation from drying cylinders, calender rolls, steam-engine cylinders, steam piping, &c., &c. Will work at zero, or 250 lb. pressure. All working parts are of gun-metal. The only trap made on a correct principle. [Illustration] _For Prices and further information apply to_ THE CHADDERTON IRON WORKS CO., LIMITED, ENGINEERS, BOILER MAKERS, AND IRONFOUNDERS, IRK VALE, CHADDERTON, Near MANCHESTER, Sole Makers of Plant for McDougall’s Patent Wood Pulp Process.