Keuffel & Esser Co. Slide Rule
physical object
2018.12.13
Description
This is a slide rule manufactured in Keuffel & Esser Co. It can be used to perform multiplication, division, square and cube root. Also, sine, cosine and tangent can be done with the slide rule. It has accuracy of two decimal places. Yet, for the third decimal place, it can be found through mental calculation. For accuracy beyond 3 decimal place, you need to perform physical calculation on a paper.
