Tamper (tool): Difference between revisions
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A [[tamper]] is a device used to compact or flatten an [[Aggregate (composite)|aggregate]], typically to make it resistant to further compression. Some examples are small, handheld tampers to compress ground [[coffee]] into a puck in the preparation of [[espresso]], manual or powered tampers to compact [[gravel]] in the preparation of laying a concrete or brick [[patio]] or [[walkway]] so that the underlying gravel layer does not settle over time, and self-propelled, mechanised [[ballast tamper]]s, which compact the [[Track ballast|ballast]] underneath [[rail tracks]]. |
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==Phineas Gage== |
==Phineas Gage== |
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Revision as of 21:10, 8 October 2008
Look up tamper (tool) in Wiktionary, the free dictionary.
A tamper is a device used to compact or flatten an aggregate, typically to make it resistant to further compression. Some examples are small, handheld tampers to compress ground coffee into a puck in the preparation of espresso, manual or powered tampers to compact gravel in the preparation of laying a concrete or brick patio or walkway so that the underlying gravel layer does not settle over time, and self-propelled, mechanised ballast tampers, which compact the ballast underneath rail tracks.
Phineas Gage
In 1848, an iron tamper traveled through the skull of Phineas Gage in a construction accident.[1]
References
- ^ Damasio H., Grabowski T,. Frank R., Galaburda AM., Damasio AR. (1994). "The return of Phineas Gage: clues about the brain from the skull of a famous patient.". Science 264 (5162): 1102-5.