Slide Rule - Proportion, Percentage, Squares And Square Roots (1944)

Uploaded by popular demand. Shows how to use the slide rule to calculate squares, square roots, proportions and percentages. To help with the A/V Geeks mission to share these forgotten films unearthed in their archive, this film and hundreds of others can be purchased on DVD (http://www.avgeeks.com/wp2/all-av-geeks-dvds/). Higher quality versions of this film can also be licensed for stock footage. Contact footage@avgeeks.com for more information.