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There was a small volume, a double roll tied round by a band of silk, his tablets and stylus were before him, the latter quite blank, and the window was open, giving him a glorious view of the distant, sunlit mountains, while the air that was wafted in through the vine leaves was rich in delicious odours that came gratefully to his nostrils.
These table-books were called by the Romans pugillares, which may be translated "hand-books"; the wood was cut into thin slices, finely planed and polished, and written upon with an iron instrument called a stylus.
White spots on the photographic print come out as black spots here on the sensitised paper over which this stylus is passing, and vice versa. In that way you can see the positive print growing here before your very eyes as the picture is transmitted from the negative which Clark has prepared and is sending from Chicago." As we bent over eagerly we could indeed now see what the thing was doing.
In this way a relief or engraving of the picture is obtained on the gelatine, and a cross section through the plate would, if looked at edgeways, appear serrated, or up and down, like a section of country or the trace of the stylus in the record of a phonograph.
Another difficulty encountered in the commercial development of the phonograph was the adjustment of the recording stylus so as to enter the wax-like surface to a very slight depth, and of the reproducer so as to engage exactly the record when formed.
When next I saw Kennedy it was late in the afternoon, in the laboratory. He was arranging something in the top drawer of a flat-top desk. It seemed to be two instruments composed of many levers and discs and magnets, each instrument with a roll of paper about five inches wide. On one was a sort of stylus with two silk cords attached at right angles to each other near the point.
I was so fortunate as to have my conjectures confirmed with respect to the exact form of the instrument by which these remarkable characters are produced, observing, in what appeared to be a hastily-formed inscription on the edge of a large brick, that the inscriber had apparently used rather more pressure on his stylus than was requisite.
Melissa had no sooner crossed the threshold, than the sculptor drew up his broad shoulders and brawny person, and raised his hand to fling away the slender stylus he had been using; however, he thought better of it, and laid it carefully aside with the other tools.
For more common occasions they write on the outer coat of a joint of bamboo, sometimes whole but generally split into pieces of two or three inches in breadth, with the point of the weapon worn at their side, which serves the purpose of a stylus; and these writings, or scratchings rather, are often performed with a considerable degree of neatness.
"Well, he resumed as the print widened visibly, this tinfoil negative is wrapped around a cylinder at the other end of the line and a stylus with a very delicate, sensitive point begins passing over it, crossing the parallel lines at right angles, like the other lines of a regular halftone.
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