A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Michael Bradley
Date: 2018 Apr 17, 15:48 -0700
The mechanical engineering dimension measuring micrometer can have the same feature, and maybe got there first. Wikipedia 'Micrometer' refers. Can't comment on the history. I guess you can think of a vernier, in general, as an analogue interpolater.
It often comes as a suprise to those of us brought up graphing data, how difficult some people find interpolation along a simple linear scale. Classical chartwork carries a good examples, i.e. the repeated errors some folk make when plotting positions on and reading positions off.