My reviews & how-tos for adding machines and other antique calculating devices.
Curated by: Chris Staecker (120 videos)
The Ad-O-Master Jr., The Magic Calculator, made by the Mystoplane Company in 1941. This is episode 56 of my video series about old calculating devices. Scan of the quiz book: https://archive.org/details/adomasterquizbook End song inspired by "Hotter than a Molotov" by The Coup. #mystoplane #adomaster Chris Staecker webarea: https://faculty.fairfield.edu/cstaecker Mystoplane photo from Henry Ford Museum Mystoscope images from https://www.worthpoint.com/worthopedia/vintage-mystoscope-mystoplane-co-ny-458372625 Stupid "Stumped the internet" problem is here: https://www.considerable.com/life/education/viral-math-problem-stumped-internet/