Vintage Guru Reveals Her Glamour Secrets
The Killer Mobile Device for Victorian Women
Gloriously Grotesque 19th-Century Pipes
The Beautiful Chaos of Improvisational Quilts
Our Dad, the Water Witch of Wyoming
This 1959 Goggomobil Is Insanely Cute and Gets 55 MPG. Why Can’t Detroit Do That?
California Cool: How the Wetsuit Became the Surfer's Second Skin
The Unfiltered History of Rolling Papers, Plus Tommy Chong's Big Fat Jamaican Vacation
World's Smallest Museum Finds the Wonder in Everyday Objects
Fightin’ Femmes: Unmasking Female Superheroes with Author Mike Madrid
Posted 1 year ago
cooljjay
(13 items)
Heres something cool and interesting....not sure how to use it but sure is interesting. Found it at a hoarders house, that was full of photography and projection equipment. Found this detail about it on a website
"This photoelectric colorimeter was designed by W. H. Summerson of Cornell University and introduced around 1939. The instrument includes an internal galvanometer and potentiometer; this specific model is designed for general colorimetric determinations.
Colorimeters are used to match and measure colors. They rely on psychophysical characteristics like hue or tint, color saturation or purity, and brightness. Photoelectric colorimeters use photocells, color filters, and amplifiers in order to provide precise determinations of color."
Tools and HardwareThe history of tools and hardware tells the story of two conflicting impuls…