[theophrastus]

Shouldn't this make some initial direct reference to the author: Silvanus P. Thompson[1]?

[1] https://en.wikipedia.org/wiki/Calculus_Made_Easy

[Jtsummers]

https://calculusmadeeasy.org/

The link isn’t to the front page with his name.

[aaronbrethorst]

Ohh, this really is from 1910. And here I just thought the author was being obnoxiously cutesy with their language.