51: cube_root( 5.49 ) = 1.76
52: cube_root( 87.1 ) = 4.43
THE 1.5 AND 2/3 POWER
If the indicator is set over a given number on the A scale, the number
under the hair-line on the K scale is the 1.5 power of the given
number. If the indicator is set over a given number on the K scale, the
number under the hair-line on the A scale is the 2/3 power of the given
number.
4 to the 3/2 power is 8
8 to the 2/3 power is 4.
COMBINATIONS OF PROCESSES
A slide rule is especially useful where some combination of processes is
necessary, like multiplying 3 numbers together and dividing by a third.
Operations of this sort may be performed in such a way that the final
answer is obtained immediately without finding intermediate results.
1. Multiplying several numbers together. For example, suppose it is
desired to multiply 4 * 8 * 6. Place the right-hand index of the C scale
over 4 on the D scale and set the indicator over 8 on the C scale. Now,
leaving the indicator where it is, move the slider till the right-hand
index is under the hairline. Now, leaving the slider where it is, move
the indicator until it is over 6 on the C scale, and read the result,
192, on the D scale. This may be continued indefinitely, and so as many
numbers as desired may be multiplied together.
Example 53: 2.32 * 154 * .0375 * .56 = 7.54
