Wisconsin Institute of Horology Home Study Course Lesson 4-6

6½" x 10" CONTENTS:Lesson 4: Mechanical Horology10) Making a Pair of Pear-Shaped Clock Hands 11) Blueing of Steel or Iron 12) Making a Pair of Hands of Richer Design 13) Making of Small Watch Parts 14) Making A Fork 15) Hardening and Tempering of Steel 16) Grinding and Polishing of Steel 17) Making A Swiss Clutch and Other Springs Lesson 5: Practical Horology18) The Mechanical Construction of a Simple Movement 19) Calculating a Train of Wheels 20) Preliminary Examination of a Clock Escapement Lesson 6: Theoretical Horology21) The Use of the T-Square 22) The Use of the Triangle in Conjunction with the T-Square 23) The Use of the Protractor 24) The Use of the Dividers, Compass and Extension Bar 25) The Use of the Drawing Pen and India Ink 2-pages of drawn figures: "Plate 2"