Have Slide Rule, Will Travel, from a ad promoting careers in science. I used these in college and had to use to do calculations to make standard solutions in Endocrine lab - that had to be in the early
The RADIAC Calculator is used by the US Army to determine the dose rates and doses to personnel after a nuclear explosion. It is the military version of the “Radiation Dosage Calculator” developed by William Orr.
How to Use a Slide Rule 1948 Vintage Booklet Eugene Dietzgen Co Illustrated
Not for children under 3 years of age due to small parts. Not for older children who still like to put stuff in their mouths when they shouldn't. Please be a responsible parent if you want this for you child and be sure it is age and developmentally appropriate for your young ones! Before electronic calculators and computers, before slide rules, we had the abacus. These still work. They are a great teaching tool, and they can be decorative, too! This one has a wood frame with finger joi...