INDUSTRIAL PUBLISHER,

NO. 406 Walnut Street, Philadelphia.

Any of the following Books will be sent by mail, free of postage, at the publication price. Catalogues furnished on application.

American Miller and Millwright's Assistant:

A now and thoroughly revised Edition, with additional Engravings. By William Carter Hughes. In one volume, 12 mo.,.....................................................$1.25

Armengaud, Amoroux, and Johnson.

The Practical Draughtsman's Rook Of Industrial Design

The Practical Draughtsman's Rook Of Industrial Design, and Machinist's and Engineer's Drawing Companion; forming a complete course of Mechanical Engineering and Architectural Drawing. From the French of M. Armengaud the elder, Prof. of Design in the Conservatoire of Arts and Industry, Paris, and MM, Armengaud the younger, and Amouroux, Civil Engineers. Rewritten and arranged, with additional matter and plates, selections from and examples of the most useful ami generally employed mechanism of the day. By William Johnson, Assoc. Inst. C. E., Editor of "The Practical Mechanic's Journal." Illustrated by fifty folio steel plates and fifty wood-cuts. A new edition, 4to.,....89.00

Among the contents are: - Linear Drawing, Definitions and Problems, Plate 1. Applications, Designs for inlaid Pavements, Ceilings and Balconies, Plate II. Sweeps. Sections and Mouldings, Plate III. Ele-mentary Gothic Forms and Rosettes, Plate IV. Ovals, Ellipses, Parabolas and Volutes, Plate V. Rules and Practical Data. Study of Projections, Elementary Principles, Plate VI. Of Prisms and other Solids, Plate VII. Rules and Practical Data. On Coloring Sections, with Applications - Conventional Colors, Composition or Mixture of Colors, Plate X. Continuation of the Study of Projections - Use of sections - detail* of machinery, Plate XI. Simple applications - spindles, shafts, couplings, wooden patterns, Plate \1I. Method of constructing a wooden model or pattern of a coupling, Elementary applications-rails and chairs for railways, Plate XI11. Rules and Practical Data -Strength of material, Resistance to compression or crushing force, Tensional Resistance, Resistance to llexurc, Resistance to tension. Friction of surfaces in contact.

The Intersections And Development Of Surfaces, With Applications

The Intersection of Cylinders and Cones, Plate XIV. The Delineation and Development of Helices, Screws and Serpentines, Plato XV. Application of the helix - the construction of a staircase, Plate XVI. The Intersection of surfaces - applications to stop-corks, Plate XVII. Rules and Practical Data - Steam, Unity of heat, Heating Surface, Calculation of the dimensions of boilers, Dimensions of firegrates, Chimneys, Safety-valves.

The study And Construction Of Toothed Gear

Involute, cycloid. and epicycloid, Plates XVIII. and XIX. Involute, Fig. I, Plato XVIII. Cycloid, Fig. 2, Plate XVIII. External epicycloid, described by a circle rolling about a fixed circle Inside it, Fig;, 3, Plate XIX. Internal epicycloid, Fig. 2. Plate XIX. Delineation of a rack and pinion in gear, Fig. 1, Plate XVIII, Gearing of a worm with a worm-wheel, Figs. 5 and 6, Plate XVIII. Cylindrical or Spur (tearing, Plato XIX. Practical delineation of a couple of Spur-wheels, Plate XX, The Delineation and Construction of Wooden Patterns for Toothed Wheels. Plate XXI. Utiles and Practical Data - Toothed gearing, Angular and circumferential velocity of wheels, Dimensions of gearing. Thickness of the teeth, Pitch of the teeth, Dimensions of the web, Number and dimensions of the arms, wooden patterns.