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Updated: May 5, 2025
In the case of the polygenetic class, the idea is necessarily twofold. The dyeing materials are not colours, only colour generators. Hence in all cases the fabric must be prepared with the twofold purpose first, of using a metallic or other agent, capable of yielding, with the dye material, the desired colour; and secondly, of yielding it on the fibre in an insoluble and permanent form.
Mechanical generators of electricity were comparatively new at that time; their theory and practice were very imperfectly understood; indeed, it is quite within the bounds of truth to say that the correct principles were befogged by reason of the lack of practical knowledge of their actual use.
If not, you'd better take 'em while the taking's good; and if they are ready for us, we'd better get out of here while we're all in one piece." And in fact Nerado had been in touch with the scientists of his city; had been instructing them in the construction of converters and generators of such weight and power that they could crush even the defenses of the super-ship.
When they rose from ordinary ground in open country, there was a vast upheaval of earth beneath their generators at the instant of take-off; this ceased as they got well above ground level.
"Without the generators, the fans won't run. They'll have to get a crew to fix them or they'll suffocate." "But that would only take a few men," Johnny said. "As soon as the generators went out, they'd look for us, and if we were missing ... well, they'd have the whole crew beating the bushes for us. It wouldn't be long before somebody thought of the ventilators."
Of course the synchronizers were automatically controlled by the operation of the generators, and only the two were needed for any number of ships drawing power from the station, providing their protection was rugged enough to stand the strain.
Yet in an optics which has learnt to reckon with both darkness and light as generators of colour, the complete spectrum phenomenon includes this colour equally with green. It needs only a glance through the prism into the sunlit world to make one convinced of the natural appearing of this delicate and at the same time powerfully luminous colour.
In answer to Ban's hands, the deck of the control cabin was literally vibrating under the mounting speed of the generators in the power-room. The generators could not stand that terrific overload long: they would burn out. But Carse needed only a few seconds of it. The asteroid was a quarter of a mile away, seen through the infra-red. The dome loomed large. "All right!" whispered Hawk Carse.
The repeller ray generators, operating on this current, and in conjunction with "twin synchronizers" in the power broadcast plant, developed two rhythmically variable ether-ground circuits of opposite polarity. In the "X" circuit, the negative was grounded along an ultraviolet beam from the ship's repeller-ray generator.
They had disposed of the unfortunate German drachenflieger and were now aiming at the incipient aeronautic park, the electric gas generators and repair stations which formed the German base. Some landed, and their aeronauts took cover and became energetic infantry soldiers. Others hovered above the fight, their men ever and again firing shots down at some chance exposure below.
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