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 161 | Next

Babbage, Charles, 1792-1871

"On the Economy of Machinery and Manufactures"

This enumeration, which is far from complete, of the
arts in which copying is the foundation, may be terminated with
an example which has long been under the eye of the reader;
although few, perhaps, are aware of the number of repeated
copyings of which these very pages are the subject.
1. They are copies, by printing, from stereotype plates.
2. These stereotype plates are copied, by the art of casting,
from moulds formed of plaster of Paris.
3. These moulds are themselves copied by casting the plaster
in a liquid state upon the moveable types set up by the
compositor.
[It is here that the union of the intellectual and the
mechanical departments takes place. The mysteries, however, of an
author's copying, form no part of our enquiry, although it may be
fairly remarked, that, in numerous instances, the mental far
eclipses the mechanical copyist.]
4. These moveable types, the obedient messengers of the most
opposite thoughts, the most conflicting theories, are themselves
copies by casting from moulds of copper called matrices.
5. The lower part of those matrices, bearing the impressions
of the letters or characters, are copies, by punching, from steel
punches on which the same characters exist in relief.


Pages:
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173