Slide rules HOME page COLLECTION 5" RULES
Make Blundell, United Kingdom
Model s150-20

1. This is a very "ordinary" slide rule. No special scales: no special history: no interesting use of colour: no abstruse gauge points. In a sense, though, that is what makes this rule important. We know a lot about the French court at Versailles - we know relatively little about how the other 99.99% of the population lived. There is a danger that if we don't preserve the "ordinary" rules, future historians of science will only know about the Analons and 2/83Ns.

Front view
0516-blundell-s150-20-01.jpg (17401 bytes)
Detail - front left
0516-blundell-s150-20-02.jpg (15145 bytes)
Detail - front right
0516-blundell-s150-20-03.jpg (12537 bytes)
Manufacturing date c 1975
Length 5"
Material Plastic
Scales S, T, A [B, CI, C] D, K, L
Cursor Plastic
Hair lines 3
Documentation None
Condition Mint