Mechanical Advantage: Tools for the Wild Vertical

Mechanical Advantage: Tools for the Wild Vertical

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The envisioning of pitons, USA 1920s (Miriam O’Brien)

Games Climbers Play

USA adoption of pitons 1920s-1939 Colorado (part A) Ellingwood and Lavender

Mechanical Advantage Volume 1 print format available

print format & Off The Sofa

Big wall history book notes (1994)

A5 Adventures 1987 and 1988 Pricelists

British Empire Pitons 1920s+, notes on Japan

Big Wall Edges

Scared Silly

INDEX to Mechanical Advantage series

Post-WW2 American Steel Pitons addendum

A5 hammer production forge process

1950s USA Gear notes

State of the Art Climbing Gear, 1964

Fallen heroes (and the climbing/politics/war/bias interface)

First carabiners for climbing-summary.

Birdbeaks

on Skunkworks...

Trains and Kain (part 2)

Feedback wanted!

Trains and Kain (Canada climbing to 1916, part 1)

Climbing Tools and Techniques—early North American Developments to 1910

Foreword (draft)

1930s Climbing Tools (Europe, PartC)

Climbing Tools and Techniques—1908 to 1939-Aid Climbing Mastery (Europe, PartB 1st draft)

Climbing Tools and Techniques—1908 to 1939 (Europe, PartA) Myths and Legends

Tita Piaz, PartD--Big Wall Climber

© 2025 John Middendorf
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