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About this book
The discussion says that many inventors pursued perpetual motion because they did not know that water pressure at a given point is equal in all directions. The account of sound describes local oscillations passing from particle to particle, with alternate compression and rarefaction carrying wave action along a column of air. The explanation of sonic transmission describes a wave generator sending pressure waves through water in flexible steel piping to operate a plunger carrying drill steel.
The account of weaving describes cards that select the threads to be raised, with large numbers arranged in a slatted belt for more elaborate designs. The watch mechanism uses an oscillating lever to release teeth of an escape wheel, while a hairspring absorbs shock and a balance wheel steadies the motion.
About the author
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Book facts
- Author
- A. Russell Bond
- Pages
- 280
- Language
- English
- Genre
- Popular Science
- Formats
- PDF, EPUB, Read online