One of the most advanced and complicated uses of the wheel occurs in the movie camera and in the movie projector. It is significant that this most subtle and complex grouping of wheels should have been invented in order to win a bet that all four feet of a running horse were sometimes off the ground simultaneously. This bet was made between the pioneer photographer Edward Muybridge and horse-owner Leland Stanford, in 1889. At first, a series of cameras were set up side by side, each to snap an arrested moment of the horse's hooves in action. The movie camera and the projector were evolved from the idea of reconstructing mechanically the movement of feet. The wheel, that began as extended feet, took a great evolutionary step into the movie theater. By an enormous speed-up of assembly-line segments, the movie camera rolls up the real world on a spool, to be unrolled and translated later onto the screen. That the movie recreates organic process and movement by pushing the mechanical principle to the point of reversal is a pattern that appears in all human extensions, whatever, as they reach a peak of performance. By speed-up, the airplane rolls up the highway into itself. The road disappears into the plane at take-off, and the plane becomes a missile, a self-contained transportation system. At this point the wheel is reabsorbed into the form of bird or fish that the plane becomes as it takes to the air. Skin-divers need no path or road, and claim that their motion is like that of bird flight; their feet cease to exist as the progressive, sequential movement that is the origin of rotary action of the wheel. Unlike wing or fin, the wheel is lineal and requires road for its completion. It was the tandem alignment of wheels that created the velocipede and then the bicycle, for with the acceleration of wheel by linkage to the visual principle of mobile lineality, the wheel acquired a new degree of intensity. The bicycle lifted the wheel onto the plane of aerodynamic balance, and not too indirectly created the airplane. It was no accident that the Wright