camera obscura, kinetoscope, eadweard muybridge, rotoscope, stereoscope, spirograph, stroboscopic, photogram, armillary sphere, automata, velocipede, armillary, doppler effect, miniature, treadle, lifesize, enlarger, papier, gnomon, holograph, muybridge, steampunk, maquette, tesla coil, bentwood, tinkertoy, clawlike, apatosaurus, stereoscopy, stereographic, electrostatic generator, refracting telescope, animatronics, pinhole camera, stereopticon, watchcase, ornithopter, ottmar mergenthaler, geometer, hexapod, cogwheel, pianola, semiabstract, stereogram, diorama, spinning jenny, iris diaphragm, hyperbolic geometry, clapperboard, cinemascope, tableaux vivants, wind vane, meccano, crosshatching, photomosaic, katsushika hokusai, tridimensional, horsehead, doodad, favrile glass, illusionism, pointillism, plasticine, lunette, lego, relativity theory, magic lantern, retroreflector, tetrahedron, tilter, handrest, armature, vitrine, contraptions, aqualung, cremaster, nickelodeon, foucault pendulum, obscura, replica, schlieren, tableau vivant, hatbox, hans arp, hieronymus bosch, pen nib, lemon squeezer, sundog, convex lens, cyclorama, planchette, polyhedron, charkha, geodesic, sackbut, gatling gun, chorography, levitation, jean honore fragonard, cuckoo clock, serigraphy, eggbeaters