tersection of Cylinders and Cones. The Delineation and Development
of Helices, Screws, and Serpentines. Application of the helix--the
construction of a staircase. The Intersection of Surfaces--applications
to stop cocks. Rules and Practical Data.

THE STUDY AND CONSTRUCTION OF TOOTHED GEAR.--Involute, cycloid, and
epicycloid. Involute, Cycloid. External epicycloid, described by a
circle rolling about a fixed circle inside of it. Internal epicycloid.
Delineation of a rack and pinion in gear. Gearing of a worm with a
worm wheel. Cylindrical or Spur Gearing. Practical delineation of a
couple of Spur wheels. The Delineation and Construction of Wooden
Patterns for Toothed Wheels. Rules and Practical Data.

CONTINUATION OF THE STUDY OF TOOTHED GEAR.--Design for a pair of bevel
wheels in gear. Construction of wooden patterns for a pair of bevel
wheels. Involute and Helical Teeth. Contrivances for obtaining
differential Movements. Rules and Practical Data.

ELEMENTARY PRINCIPLES OF SHADOWS.--Shadows of Prisms, Pyramids, and
Cylinders. Principles of Shading. Continuation of the Study of
Shadows. Tuscan Order. Rules and practical data.

APPLICATION OF SHADOWS TO TOOTHED GEAR.--Application of Shadows to
Screws. Application of Shadow to a Boiler and its Furnace. Shading in
Black--Shading in Colors.

THE CUTTING AND SHAPING OF MASONRY.--Rules and Practical Data. Remarks
on Machine Tools.

THE STUDY OF MACHINERY AND SKETCHING.--Various applications and
combinations: The Sketching of Machinery. Drilling Machines; Motive
Machines; Water wheels. Construction and Setting up of water wheels.
Delineation of water wheels. Design of a water wheel. Sketch of a
water wheel. Overshot water wheels. Water Pumps; Steam Motors;
High-pressure expansive steam engine. Details of Construction;
Movements of the Distribution and Expansion Valves; Rules and
Practical Data.

OBLIQUE PROJECTIONS.

PARALLEL PERSPECTIVE.

TRUE PERSPECTIVE.--Elementary principles. Applications--flour mill
driven by belts. Description of the mill. Representation of the mill
in perspective.

EXAMPLES OF FINISHED DRAWINGS OF MACHINERY.

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