Philosophical transactions of the Royal Society of London
Philosophical Transactions of the Royal Society of London, a 1672 journal issued in London by the Royal Society for natural philosophers and scientific correspondents. Its plates are geometric and optical diagrams: a ray-tracing figure with lettered lines, a construction with a tangent and labelled arcs, circles with inscribed quadrilaterals and triangles, and folding plates of squares, grids and curves. A designer might take their clean line work and lettered labels as a source for precise technical diagrams.
