Dietzgen No. 1767 Maniphase Slide Rule

* Multiplication 

** 2-factor

  1. Set C scale left or right index over mulitiplicand on D scale.
  2. Set indicator to multiplier on C scale.
  3. Read product at indicator on D scale.

** 3 or more factors using C & D scales

  1. Multiply first two factors as above.
  2. Leaving indicator in place, set C left index under indicator.
  3. Set indicator to next factor on C scale.
  4. Read product at indicator on D scale.

* Division

  1. Set divisor on C scale over dividend on D scale.
  2. Read quotient at C scale index on D scale.

* Mixed multiplication and division

  (Alternate divisions and multiplications for each divisor and factor.)