... drop 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 ... extraction)100torcs, arsenical copper 61torpedo boats 534 torpedoes 534, 537, 997, 1000 ‘human’ 1002Tour Through the Whole Island of Great Britain(Defoe) 434 towelling 847tower buttress 877tower mills ... machines 417transfer printing (pottery) 194transformers 371transistor radios 728transistors 42, 419, 703transmission cables 371–2transplanting 773transporter bridges 496, 518trapetum 263Travels...