Philosophical transactions of the Royal Society of London
Philosophical Transactions of the Royal Society of London, issued in London in 1670 by the Royal Society for its fellows and the learned public. Its plates show geometric diagrams of circles and ellipses with lettered construction lines, a branching tree-like figure with a lattice fan, and mechanical apparatus drawings such as boxes, pulleys and fish-trap-like cages in fine line engraving. A designer could draw on the precise hairline diagrams, the ornamental woodcut initial, and the tidy grid of labelled figures.
