Fairly basic text based around coursework for the International Correspondence Schools of Scranton, Pennsylvania. I know of three versions of this book which were published, two in hard back and one in paper back. This example is the later paperback version and was formerly attributed to Rufus T Strohm. This later version no longer bears Strohm's name and has an additional section with instructions for Circular slide rules.

• Author: ICS Staff
• Publisher: International Textbook Company
• Copyright Date: 1939, 1948
• Pages: 94
• Condition: Good

Two of the illustrations to the left are from the earlier version of the manual, they are identical to the ones in this book. Place your cursor over the illustrations to see which book they are from.

1	Construction of Slide Rules
2	General Features of Slide Rules
3	Parts of Slide Rules
4	Graduations of Scales
5	Basis of Graduation
6	Principles of Operation of Slide Rule
7	Values of Graduations
8	Usual Operations with Mannheim Slide Rules
9	Location of Decimal Point
10	Multiplication With Slide Rule
11	Division With Slide Rule
12	Multiplication and Division Combined
13	Powers and Roots
14	Special Uses of Mannheim Slide Rules
15	Mantissa of Logarithms
16	Trigonometric Functions
17	Slide Rules With Folded Scales and Log Log Scales
18	Folded Scales
19	Log Log Scales
20	Trigonometric Functions With Duplex Rule
21	Circular Slide Rule
22	Features of Construction
23	Multiplication and Division
24	Powers and Roots
25	Trigonometric Functions
26	Use of Other Scales
27	Examination Questions