Humboldt State University ® Department of Chemistry

Richard A. Paselk

Making Graduated Circles and Arcs

There are a number of different methods available for graduating a circle. I will describe a few I am familiar with, beginning with the oldest, traditional methods, and working towards the present.

In a similar manner, a 90° quadrant may be divided. As an example, you may follow the step-by-step graduation of a bronze quadrant by following this link.


Instruments Medieval Science & Scientific Instruments


© R. Paselk
Last modified 9 August 2015