... 417transfer printing (pottery) 194transformers 371transistor radios 728transistors 42, 419, 703transmission cables 371–2transplanting 773transporter bridges 496, 518 trapetum 263Travels (Marco ... 282 poppet 282 slide 282, 344–5,404 thermionic 41, 727, see also diode; triodeWankel rotating disc 328Van Harinxma Canal 492Van Starkenborgh Canal 492Vanguard rocket 656Variomatic belt dirve ... INDEX OF TOPICS1055roller mill (corn) 257roller printing (textiles) 835rolling mills 28, 152, 180 , 381Roman cement 888, 889Roman mill 19, 20Romanesque architecture 874, 875, 876Romans 18...