Treatise on natural philosophy
A university-level physics textbook by William Thomson (Lord Kelvin) and Peter Guthrie Tait, reissued by Cambridge University Press in 1912 for students of analytic mechanics, tides and calculating machines. The plates are line diagrams: labelled axes, asymptotic curves, dotted construction lines, force arrows on ellipses, and nested contour lines inside a triangle, usable as spare geometric line art and axis lettering.
