Concise circular slide rule No. 270N

With instruction manual and case. Excellent condition.

"Figure on the Caterpillar Line" on the reverse side.

Description

This is a slide rule that allows a wider range of calculations other than addition and subtraction, as well as general calculations (multiplication, division, squaring and cubing, etc.). It can also perform calculations such as cubic, square, and trigonometric functions. Types of calculations: general multiplication and division, proportionality (exponential percentages), square, cubic and trigonometric calculations. Scales: A, D, C, CI, B, K, L (front side), DI, D, S, T1, T2, ST (back side). Storage case and instruction manual included.