# Slide Rule - Proportion, Percentage, Squares And Square Roots

Shows how to use the slide rule to calculate squares, square roots, proportions and percentages. This film can be purchased on DVD and higher quality versions of the film can be purchased for stock footage purposes. Contact footage@avgeeks.com for more information

- Kind: Film
- Year: 1944
- By: Loucks And Norling Studios
- Genres: Industrial and advertising
- Archive: [Internet Archive](https://archive.org/details/SlideRule)
- Licence or status: none stated by the archive
- Who can watch: Tweens profiles and older (the archive gives no rating; placed by Invisible Network from its collection and subjects)

[Watch now](https://invisiblenetwork.ai/watch/archive/ia/SlideRule?play=1)