On a surveyor's web site the following was posted yesterday:

Had to lay-out 300 foot vertical curve. Old man walks over and looks at me
computing ordinates. He pulls a slide rule out! Sets grade angle (7%) on scale A
adjacent to twice the length (600) on scale B. Looks at 50 on scale C and reads 0.29
from scale A, then 100 on C and 1.17 on A, then 150 on C and 2.625 on A.
He computed ordinates with a beaten up old slide rule before I knew what was
happening. Took him all of TEN seconds!

Anybody got a sliderule they don't want?

SRs still work don't they?

marion moon