Pascal-Type Calculator
physical object
2010.4.1
Description
This circle slide rule made by Keuffel & Esser Co. of Weston Massachusetts, was believe to be owned and used by William H. Breithaupt, an entrepreneur and engineer who was influential in the development of the Waterloo region during the early 20th century. This slide rule was made in the Keuffel & Esser Co. office in New York.
![[BLANK]](https://computermuseum-dev.uwaterloo.ca/media/computermuseum/images/2/4/35231_ca_object_representations_media_2449_large.jpg)