4. This mill again stops, and another forceps removes the
pointed pin into a pair of strong steel clams, having a small
groove in them by which they hold the pin very firmly. A part of
this groove, which terminates at that edge of the steel clams
which is intended to form the head of the pin, is made conical. A
small round steel punch is now driven forcibly against the end of
the wire thus clamped, and the head of the pin is partially
formed by compressing the wire into the conical cavity.
NOTES:
1. I have already stated that this principle presented itself to
me after a personal examination of a number of manufactories and
workshops devoted to different purposes; but I have since found
that it had been distinctly pointed out in the work of Gioja.
Nuovo Prospetto delle Scienze Economiche. 6 tom. 4to. Milano,
1815, tom. i. capo iv.
2. The great expense of turning the wheel appears to have arisen
from the person so occupied being unemployed during half his
time, whilst the pointer went to another manufactory.
Chapter 20
On the Division of Labour
241. We have already mentioned what may, perhaps, appear
paradoxical to some of our readers that the division of labour
can be applied with equal success to mental as to mechanical
operations, and that it ensures in both the same economy of time.
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