The Scales of the Slide Rule 2/83 N

All scales are marked with reference to the basic scales C and D. At the right.hand end of the slide rule they bear the mathematical formula based on the numbering of the basic scales. The cursor, entirely surrounding the slide rule, enables each stage of the calculation to be connected with the next, throughout all the scales on the front and back of the slide rule.

 

Scales on the front of the slide rule:

1st tangent scale

T1

tan 0.1x (cot)

on upper body

2nd tangent scale

T2

tan x(cot)

cube scale

K

x3

fixed square scale

A

x2

fixed x.folded scale

DF

px

movable x.folded scale

CF

px

on slide

movable square scale

B

x2

reciprocal x.folded scale

CIF

1 :px

reciprocal basic scale

CI

1 : x

movable basic scale

C

x

fixed basic scale

D

x

on lower body

fixed reciprocal basic scale

DI

1 : x

sine scale

S

sin 01x (cos)

arc scale for small angles

ST

arc 0.01 x

Pythagorean scale

P

(1 . (0.1 x)2)

 

Scales on the back of the slide rule:

exponential scales for negative exponents

LL03

ex

on upper body

LL02

e0,1 x

LL01

e0,01x

LL00

e0,001

2nd fixed root scale

W2

(10x)

2nd movable root scale

W2'

(10x)

on slide

reciprocal basic scale

CI

1 : x

mantissa scale

L

log x

movable basic scale

C

X

1st movable root scale

W1'

x

1st fixed root scale

W1

x

fixed basic scale

D

x

on lower body

and exponential scale

LL0

e0,001x

additional exponential scales for positive exponents

LL1

e0,01x

LL2

e0,1x

LL3

ex