ILE Page 48

The First Test. Filing an Irregular Block. Filing a Bar Straight.
Filing Bar with Parallel Sides. Surfacing Off Disks. True Surfacing.
Precision Tools. Test of the Mechanic. Test Suggestions. Use of the
Dividers. Cutting a Key-way. Key-way Difficulties. Filing Metal Round.
Kinds of Files. Cotter-file. Square. Pinion. Half-round. Round.
Triangular. Equalizing. Cross. Slitting. Character of File Tooth.
Double Cut. Float-cut. Rasp Cut. Holding the File. Injuring Files.
Drawing Back the File.

V. HOW TO COMMENCE WORK Page 61

Familiarity with Tools. File Practice. Using the Dividers. Finding
Centers. Hack-saw Practice. Cutting Metal True. Lathe Work. First
Steps. Setting the Tool. Metals Used. The Four Important Things.
Turning Up a Cylinder. Turning Grooves. Disks. Lathe Speeds.

VI. ILLUSTRATING SOME OF THE FUNDAMENTAL DEVICES Page 68

Belt Lacing. Gears. Crown Wheel. Grooved Friction Gearing. A Valve
which Closes by the Water Pressure. Cone Pulleys. Universal Joint.
Trammel for Making Ellipses. Escapements. Simple Device to Prevent a
Wheel or Shaft from Turning Back. Racks and Pinions. Mutilated Gears.
Simple Shaft Coupling. Clutches. Ball and Socket Joints. Tripping
Devices. Anchor Bolt. Lazy Tongs. Disk Shears. Wabble Saw. Crank Motion
by a Slotted Yoke. Continuous Feed by Motion of a Lever. Crank Motion.
Ratchet Head. Bench Clamp. Helico-volute Spring. Double helico-volute.
Helical Spring. Single Volute Helix Spring. Flat Spiral, or Convolute.
Eccentric Rod and Strap. Anti-dead Center for Lathe.

VII. PROPERTIES OF MATERIALS Page 79

Elasticity. Traction. Torsion. Flexure. Tenacity. The Most Tenacious
Metal. Ductility. Malleability. Hardness. Alloys. Resistance.
Persistence. Conductivity. Equalization. Reciprocity. Molecular Forces.
Attraction. Cohesion. Adhesion. Affinity. Porosity. Compressibility.
Elasticity. Inertia. Momentum. Weight. Centripetal Force. Centrifugal
Force. Capillary Attraction. The Sap of Trees. Sound. Acoustics. Sound
Mediums. Vibration. Velocity of Sound. Sound Reflections. Resonance.
Echos. Speaking Trumpet. The Stethoscope. The Vitascope. The
Phonautograph. The Phonograph. Light. The Corpuscular Theory.
Undulatory Theory. Luminous Bodies. Velocity of Light. Reflection.
Refraction. Colors. The Spectroscope. The Rainbow. Heat. Exp