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The effect was startling: there was the sudden bright flash of yellow glittering light, the splash of sparks, and a scream of pain and rage from the tam as he immediately beat his wings, lifting himself out of my reach in arush of air that nearly forced me over the edge of the roof. I was on my hands and knees, trying to get back on my feet, too near the edge. The tam was circling the cylinder, uttering piercing cries; then he began to fly away from the city.
Without knowing why, and thinking I was better off to have the thing in retreat, I seized my tam whistle and blew its shrill note. The giant bird seemed almost to shudder in the air, and then he reeled, losing altitude, gaining it again. If he had not been simply a winged beast, I would have believed him to be struggling with himself, a creature locked inwardly in mental torture. It was the wild nature of the tarn, the call of the distant hills, the open sky, against the puny conditioning he had been subjected to, against the will of tiny men with their private objectives, their elementary psychology of stimulus and response, their training wires and taro-goads.
At last, with a wild cry of rage, the tam returned to the cylinder. I seized the short mounting ladder swinging wildly from the saddle and climbed it, seating myself in the saddle, fastening the broad purple belt that would keep me from tumbling to my death.
The tarn is guided by virtue of a throat strap, to which are attached, normally, six leather streamers, or reins, which are fixed in a metal ring on the forward portion of the saddle. The reins are of different colors, but one learns them by ring position and not color. Each of the reins attaches to a small ring on the throat strap, and the rings are spaced evenly. Accordingly, the mechanics are simple. One draws on the streamer, or rein, which is attached to the ring most nearly approximating the direction in which one wishes to go. For example, to land or lose altitude, one uses the four-strap which exerts pressure on the four-ring, which is located beneath the throat of the tarn. To rise into flight, or gain altitude, one draws on the one-strap, which exerts pressure on the one-ring, which is located on the back of the tam's neck. The throat-strap rings, corresponding to.the position of the reins on the main saddle ring, are numbered in a clockwise fashion.
The tam-goad also is occasionally used in guiding the bird. One strikes the bird in the direction opposite to which one wishes to go, and the bird, withdrawing from the goad, moves in that direction. There is very little precision in this method, however, because the reactions of the bird are merely instinctive, and he may not withdraw in the exact tangent desired. Moreover, there is danger in using the goad excessively.
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