A Practical Course of Instruction in the Science of Horology or The Construction and Repair of Time-Measurement Instruments Form 2005 -A-H- A Student Textbook

Denver Colorado: The American Horologist, 1940. First Edition Assumed . Hard Back. Very Good. 8 3/4" X 11 1/4. 311 Numbered Pages. As New condition. A solid 2½ inch book with black boards and gold lettering on the spine. The interior text and illustration pages are free of marks and flawless. The student blanks have not been filled in. At the end of most of the 26 lessons are illustration pages that are un-numbered and not included in the page count. The actual page count is more like 450 or so. Contents in Three Sections: Basic Mechanics, Clock Repairs, and Watch Repairing. Each of the 26 lessons has a title page and most have a copyright of 1940 however there is a consistent paragraph numbering 1 thru 154 for the Lessons 1 thru 24. Lesson 25 is labeled Unit Q I-5 #21547. Lesson 26 consists entirely of eight illustration pages from the American Horologist with dates of 1946 and 1947. An example of Lesson Contents is this from Lesson 9: Pin-Wheel Escapement, Alarm Clock Mechanism, Pin-Lever Escapement, Putting the Escapement on Beat, the Angular Motion of the Fork, The Pallet Action, The Draw, The Safety Action, The Balance Spring or Hairspring, and Adjusting the Hairspring. (Pages 127 thru 142 plus 3 un-numbered pages of illustration and student questions). This is probably a textbook used by the Horological Colleges in existence in 1940. Scans and additional information available on request. Large, heavy book that may incur additional shipping charges to some locations.