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Manufacturing

On The Causes And Consequences Of Large Factories
263. On examining the analysis which has been given in chapt...

Of Raw Materials
210. Although the cost of any article may be reduced in its ...

Increase And Diminution Of Velocity
32. The fatigue produced on the muscles of the human frame d...

Of Price As Measured By Money
201. The money price at which an article sells furnishes us ...

Proper Circumstances For The Application Of Machinery
329. The first object of machinery, the chief cause of its e...

On Combinations Of Masters Against The Public
376. A species of combination occasionally takes place among...

On Combinations Amongst Masters Or Workmen Against Each Other
353. There exist amongst the workmen of almost all classes, ...

On The Position Of Large Factories
277. It is found in every country, that the situation of lar...

On The Method Of Observing Manufacturies
160. Having now reviewed the mechanical principles which reg...

On The Effect Of Machinery In Reducing The Demand For Labour
404. One of the objections most frequently urged against mac...

Saving Time In Natural Operations
47. The process of tanning will furnish us with a striking i...

Of Copying By Moulding
112. This method of producing multitudes of individuals havi...

Of Copying With Altered Dimensions
147. Of the pentagraph. This mode of copying is chiefly used ...

Sources Of The Advantages Arising From Machinery And Manufactures
1. There exists, perhaps, no single circumstance which disti...

Accumulating Power
20. Whenever the work to be done requires more force for its ...

Of Money As A Medium Of Exchange
166. In the earlier stages of societies the interchange of t...

Of Copying By Casting
105. The art of casting, by pouring substances in a fluid st...

On The Influence Of Durability On Price
197. Having now considered the circumstances that modify what...

Economy Of The Materials Employed
77. The precision with which all operations by machinery are ...

Exerting Forces Too Great For Human Power And Executing Operations Too Delicate For Human Touch
56. It requires some skill and a considerable apparatus to e...



Extending The Time Of Action Of Forces








45. This is one of the most common and most useful of the
employments of machinery. The half minute which we daily devote
to the winding-up of our watches is an exertion of labour almost
insensible; yet, by the aid of a few wheels, its effect is spread
over the whole twenty-four hours. In our clocks, this extension
of the time of action of the original force impressed is carried
still further; the better kind usually require winding up once in
eight days, and some are occasionally made to continue in action
during a month, or even a year. Another familiar illustration may
be noticed in our domestic furniture: the common jack by which
our meat is roasted, is a contrivance to enable the cook in a few
minutes to exert a force which the machine retails out during the
succeeding hour in turning the loaded spit; thus enabling her to
bestow her undivided attention on the other important duties of
her vocation. A great number of automatons and mechanical toys
moved by springs, may be classed under this division.

46. A small moving power, in the shape of a jack or a spring
with a train of wheels, is often of great convenience to the
experimental philosopher, and has been used with advantage in
magnetic and electric experiments where the rotation of a disk of
metal or other body is necessary, thus allowing to the enquirer
the unimpeded use of both his hands. A vane connected by a train
of wheels, and set in motion by a heavy weight, has also, on some
occasions, been employed in chemical processes, to keep a
solution in a state of agitation. Another object to which a
similar apparatus may be applied, is the polishing of small
specimens of minerals for optical experiments.





Next: Saving Time In Natural Operations

Previous: Increase And Diminution Of Velocity



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