The Most Accurate Tape Measure? I found it

Why we made the plans for this mystery

How an ingenious 400 year old drawing predicted the future

The INSANE Precision of The National Institute of Standards and Technology

The HIDDEN Screws of PRECISION

The most important screws EVER MADE!

Where DO screws come from?

IRON from SAND - Oldest form of iron smelting

Perfect Timing (with the Marble Machine X)

World's Oldest Micrometer - 1776! Who made this thing??

At This Moment (1956) - Unusual Railroad movie explained!

America's Iron Giants - The World's Most Powerful Metalworkers

The Brilliant Engineering and Beauty of the Llangollen Canal

Fear and Lathing in The Scientific Revolution

Cutting threads and worm gears on a lathe

How to find historical images for FREE!

The 1751 Machine that Made Everything

New method for etching brass dials - great detail!

Paris' Incredible Temple To Science

Origins of Precision