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The ever changing electrical current passes up through the stylus, vibrates with ever varying degrees of intensity over the thousand miles of telephone wire between Chicago and this instrument here at the other end of the line. "In this receiving apparatus the current causes another stylus to pass over a sheet of sensitised chemical paper such as we have here.
The very helmsman just behind him got uneasy at that performance, not being capable of understanding exactly what the "old man was kicking up a row with the mate about." Then Johns, after calming down a bit, would begin again. "The sensitised plate can't lie. No, sir." Nothing could be more funny than this ridiculous little man's conviction his dogmatic tone.
An ordinary negative picture is taken, and then impressed on a gelatine plate sensitised with bichromate of potash. The parts of the gelatine in light become insoluble, while the parts in shade can be washed away by water.
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