SEARCH
0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Prev | Current Page 130 | Next

Babbage, Charles, 1792-1871

"On the Economy of Machinery and Manufactures"

The commoner
sorts of knives, the crooked handles for umbrellas, and a
multitude of other articles to which horn is applied, attest the
cheapness which the art of copying gives to the things formed of
this material.
119. Moulding tortoise-shell. The same principle is applied
to things formed out of the shell of the turtle, or the land
tortoise. From the greatly superior price of the raw material,
this principle of copying is, however, more rarely employed upon
it; and the few carvings which are demanded, are usually
performed by hand.
120. Tobacco-pipe making. This simple art is almost entirely
one of copying. The moulds are formed of iron, in two parts, each
embracing one half of the stem; the line of junction of these
parts may generally be observed running lengthwise from one end
of the pipe to the other. The hole passing to the bowl is formed
by thrusting a long wire through the clay before it is enclosed
in the mould. Some of the moulds have figures, or names, sunk in
the inside, which give a corresponding figure in relief upon the
finished pipe.
121. Embossing upon calico. Calicoes of one colour, but
embossed all over with raised patterns, though not much worn in
this country, are in great demand in several foreign markets.


Pages:
118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142