The description and use of two arithmetick instruments : together with a short treatise, explaining and demonstrating the ordinary operations of arithmetick : as likewise, a perpetual almanack, and several useful tables ... 1673
Radio set containing original printed circuit boards, by Paul Eisler, Europe, 1942 Radio set containing original printed circuit boards 1942
Working model of the double trunk steam engines, as used on HMS 'Minotaur (1867) and HMS 'Northumberland' (1868) 1845