The scales of the pocket slide rule 62/83 N with graduation length 5" (12.5 cm)

From graduation figure 1 to graduation figure 1.2. (Section of scale reading 1 to 2)

Each interval is equivalent to 2 sub sections. An accurate reading can be taken of the values corresponding to 3 places. The odd numbers are obtained by halving the distance between two graduation marks.

From graduation figure 2 to graduation figure 3. (Section of scale reading 2 to 5)

Each interval is equivalent to 5 sub sections. This provides an accurate reading of the values corresponding to 3 places, if the last figure is a 5.

From graduation figure 5 to graduation figure 7. (Section of scale reading 5 to 10)

Each interval is equivalent to 10 sub.sections. This provides an accurate reading of the values corresponding to 2 places, which more over are identified by graduation marks.

Other intermediate values must be estimated. Example: To set to 318, first find 3.1.7.5 by halving the distance between 315 and 320, and then move the cursor line slightly to the right.