This manual is divided into four divisions as follows:
**The Scales and Their Usages**

**Slide Rule Operation:**

1 |
Multiplication |

2 |
Continuous Multiplication |

3 |
Division |

4 |
Mixed Calculation of Multiplication and Division |

5 |
The Folded Scale CF and DF |

6 |
Squares and Square Roots |

7 |
Cubes and Cube Roots |

8 |
Reciprocal |

9 |
Another Fundamental Calculation |

10 |
The Sine of an Angle |

11 |
The Cosine of an Angle |

12 |
The Tangent of an Angle |

13 |
The Sine and Tangent of an Angle Smaller than 5°54´ |

14 |
The Function of Angles Less than 0°34´ |

15 |
Other Trigonometrical Functions |

16 |
Logarithms |

**Log Log Scales:**

17 |
Multiplication |

18 |
Continuous Multiplication |

19 |
Division |

20 |
Mixed Calculation of Multiplication and Division |

21 |
The Folded Scale CF and DF |

**Duplex Slide Rule for Expert Electrical Engineer:**

22 |
General Description |

23 |
Arrangement and Usage of Scales |

24 |
Trigonometrical Function |

25 |
Vector |

26 |
Hyperbolic Function |

27 |
Hyperbolic Function of Complex Angle |

28 |
Decibel Calculation |

29 |
Some Applications on Electrical Problems |

All of that in only 30 pages. Most of the sections are very brief and only briefly touch on some of the topics, many are
just a single calculation or description of the usage and the user is expected to already have the basic understanding
of what the author is describing.