Essay de dioptrique
Essay de dioptrique is a 1694 treatise on optics by Nicolas Hartsoeker, printed in Paris by Jean Anisson for a French-reading audience of scientists and students. Its pictures are precise geometric diagrams of lines, rays and curves labelled with capital letters, showing how light bends through lenses and surfaces; a designer might take their clean, hand-drawn linework and lettered construction layouts as a model for technical schematics.
