My Background Is Real :-) - Circular Slide Rule
I got this slide rule in the 70's. My high school physics teacher ordered them for whoever wanted one -- it cost me $5.00 (approximately $29.40 in 2025 dollars).
I got this slide rule in the 70's. My high school physics teacher ordered them for whoever wanted one -- it cost me $5.00 (approximately $29.40 in 2025 dollars).
