[Various] [Moveables] Four works with movable plates: (1) Hoorweg, J.L. De gas- en petroleummotoren Beknopte uiteenzetting van de inrichting en werking van dezen motoren, aanschouwelijk voorgesteld door een beweegbaar model en opgehelderd door geïllustreerden verklarenden tekst. Tweede druk. Deventer, Ae. E. Kluwer, 1911, (2),23,(1) p., w. loosely inserted movable col. lithogr. plate, folio. Back wr. loose. (2) Flesseman, E. Jr. and D.H. Stigter. De accumulator. Met beweegbaar model en 19 afbeeldingen. Tweede druk. Ibid., idem, 1924, (6),24 p., w. ills. and loosely inserted movable col. lithogr. plate, folio. Part 3 of the series De voornaamste electrische machines en toestellen. -and 2 similar others, one lacking title and front wr., the other w. (perhaps) incorrect plate loosely inserted. (total 4)

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