Contributions to electricity and magnetism
This is a scientific paper by Joseph Henry, published in Philadelphia in 1839, recording his experiments in electromagnetic induction for an audience of natural philosophers. The pictures are plain line engravings of coils, helices and wire leads drawn in simple ink outline with figure letters and captions. A designer might take from them the clean, schematic diagram style of nineteenth-century technical figures, with labelled parts set against blank cream paper.
