The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 36
... period ( or rate of vibrations ) , any enclosure - whether an audio speaker cabinet or the nave of a cathedral - imposes its resonance characteristics on a sound wave within it . Any tone that approximates in frequency the ...
... period ( or rate of vibrations ) , any enclosure - whether an audio speaker cabinet or the nave of a cathedral - imposes its resonance characteristics on a sound wave within it . Any tone that approximates in frequency the ...
Page 76
... period ; the so- called Minas series ( a long belt of metamorphosed sedi- ments located in the State of Minas Gerais , Brazil ) , on the other hand , which contains considerable quantities of valuable minerals , belongs to the late period ...
... period ; the so- called Minas series ( a long belt of metamorphosed sedi- ments located in the State of Minas Gerais , Brazil ) , on the other hand , which contains considerable quantities of valuable minerals , belongs to the late period ...
Page 78
... period it regressed once more when mountain - building movements occurred in the Andean region . Much sedi- mentation occurred during this period , with sands being deposited in the Andean Geosyncline , sandstones in Amazonia , and ...
... period it regressed once more when mountain - building movements occurred in the Andean region . Much sedi- mentation occurred during this period , with sands being deposited in the Andean Geosyncline , sandstones in Amazonia , and ...
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