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Archives: Portfolio

A portfolio type for featuring items in your portfolio.

Locke’s “pocket” adder

Portfolio 1

Well, at least it’s pretty!

Black Gem

Portfolio 3

The Golden Gem adding Machine

The Xeroxed calculator

Portfolio 5

Ugly it was, but extremely useful!

Just a couple of relays

Portfolio 7

Shades of the ASCC!

The bare bones Hemmi 22

Portfolio 9

As simple as it gets!

Joe Gerber’s pajamas

Portfolio 11

A truly ingenious device!

Thacher’s monster slide rule

Portfolio 13

Over nine meters of logarithmic scale!

Chesterman’s Cattle Gauge

Portfolio 15

Don’t buy a cow without it!

Psychrometric slide rule

Portfolio 17

A relative humidity calculator

Illustrated Natural Philosophy

Portfolio 19

The charm of 19th century scientific illustrations

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