Scientific American, Volume XXIV., No. 12, March 18, 1871: A Weekly Journal of Practical Information, Art, Science,; Mechanics, Chemistry, and Manufactures.Various
Science
Scientific American, Volume XXIV., No. 12, March 18, 1871: A Weekly Journal of Practical Information, Art, Science,; Mechanics, Chemistry, and Manufactures.
Various
Science -- Periodicals; Technology -- Periodicals
junction; this tends to define the joint. The color is now let to
dry hard, when it will be ready for over-combing--that is, combing or
graining over the figure (hence its name), and this will have to be
done somewhat differently to the ordinary combing. As thus: The color
is rubbed in as before, and combed solely with the gutta-percha combs,
but these are specially cut for the purpose; they are best about 2 in.
wide. The first must be cut with teeth about three-sixteenths of an
inch in width, the next one-eighth, and the third about one-sixteenth.
The broad-toothed comb is first used, and must be drawn down the
panel, with a wavy motion, in short or long curls; either will
answer our purpose now. The next size of comb is then drawn straight
down--the straighter the better. This has the effect of breaking the
wavy combing into short and long straight bits, similar to the pores
or grain of the real wood. Both the first and second combing may be
varied by holding the comb in a slanting direction, and may be fine or
coarse, according to the width of the combs used; now take a soft rag
folded, and with this partially clear off the grain which runs over
the figure, leaving only a sufficient quantity crossing the light
or figure, to be just distinguished, exactly as it appears upon the
figure in real oak. The grain is also wiped off in parts on the plain
spaces between the figure, in order to break it up and take away any
formality. If this method be well and probably done, a thoroughly
deceptive imitation may be produced; and except this end be kept in
view, no really good work will result.
* * * * *
KNOTS AND SPLICES.
[_SEE ENGRAVING ON FIRST PAGE._]
1. Turn used in making up ropes.
2. End tapered for the purpose of passing it readily through a loop.
To make this, we unlay the rope for the necessary length, reducing
a rope diminishing in diameter towards the end, which is finished
by interlacing the ends without cutting them, as it would weaken the
work; it is lastly "whipped" with small twine.
3. Tapered end, covered with interlaced cordage for the purpose of
making it stronger. This is done with very small twine attached at
one end to the small eye, and at the other to the strands of the rope,
thus making a strong "webbing" around the end.
4. Double turn used for making rope.
5. Eye splice. The strands of the cable are brought back over
themselves, and interlaced with their original turns, as in a splice.
6. Tie for the end of a four-strand rope.
7. The same completed; the strands are tied together, forming loops,
laying one over the other.
8. Commencement for making the end by interlacing the strands.
9. Interlacing complete, but not fastened.
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