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Archives: Portfolio

A portfolio type for featuring items in your portfolio.

Growing up in Electronics

Portfolio 1

A wonderful hobby, on a shoestring

“Iron Felix” meets the Odhner calculator

Portfolio 3

Two pinwheel calculators compared

Elisha Kally’s water flow calculator

Portfolio 5

Made by one smart water engineer!

Slide rules for a new century

Portfolio 7

Tavernier-Gravet’s evolving slide rule technology

Piercing the unknown

Portfolio 9

IBM pluggable units

Humanity’s victory over rust!

Portfolio 11

A personal history of stainless cutlery

Meet E. W. Fritchley

Portfolio 13

A human connection across time and space

Sbernadori’s aerophotographical slide rule

Portfolio 15

Serving the Royal Italian air force

The Watkins exposure meter

Portfolio 17

Light metering, 19th century style

The ingenious Ifach adder

Portfolio 19

A carry mechanism with no gears!

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