david_megginson, 1 month ago Currency conversion with a slide rule (circular or straight) is also simple. For example, today 1 British pound is worth 20.9 Mexican pesos: Put 2.09 above 1. Keeping the same alignment, read pesos above pounds (or vice-versa) anywhere on the wheel For example, 450 Mexican pesos is approximately £21.50. Closeup of a homemade circular slide rule showing 4.5 on the outer D scale above 2.15 on the inner C scale.
Currency conversion with a slide rule (circular or straight) is also simple. For example, today 1 British pound is worth 20.9 Mexican pesos:
For example, 450 Mexican pesos is approximately £21.50.
Closeup of a homemade circular slide rule showing 4.5 on the outer D scale above 2.15 on the inner C scale.
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