By means of valves the proportions of the gases can be regulated to give the best results.
How it Works by Archibald Williams is part of the HackerNoon Books Series. You can jump to any chapter in this book . here Chapter XIII. The simple microscope—Use of the simple microscope in the telescope—The terrestrial telescope—The Galilean telescope—The prismatic telescope—The reflecting telescope—The parabolic mirror—The compound microscope—The magic-lantern—The bioscope—The plane mirror. IN Fig. 119 is represented an eye looking at a vase, three inches high, situated at a, a foot away.
In the marine searchlight a powerful arc lamp is arranged with the arc at the focus of a parabolic reflector, which sends all reflected light forward in a pencil of parallel rays. The most powerful searchlight in existence gives a light equal to that of 350 million candles. THE COMPOUND MICROSCOPE.
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