The New Encyclopaedia Britannica, Volume 26Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 849
... period , is constant . The Italian scientist Galileo first noted ( about 1583 ) the constancy of a pendulum's period by compar- ing the movement of a swinging lamp in a Pisa cathedral with his pulse rate . Christiaan Huy- gens , a Dutch ...
... period , is constant . The Italian scientist Galileo first noted ( about 1583 ) the constancy of a pendulum's period by compar- ing the movement of a swinging lamp in a Pisa cathedral with his pulse rate . Christiaan Huy- gens , a Dutch ...
Page 878
period - luminosity relationship ( astrono- my ) : see Cepheid variable . periodontal membrane , or PERIODONTAL ... period periodic motion , motion repeated in equal intervals of time , the time of each interval be- ing called the period ...
period - luminosity relationship ( astrono- my ) : see Cepheid variable . periodontal membrane , or PERIODONTAL ... period periodic motion , motion repeated in equal intervals of time , the time of each interval be- ing called the period ...
Page 883
... Period 14:96 , the geologic period that began 280,000,000 years ago and lasted 55,000,000 years ; during this final period of the Paleozoic Era , which followed the Car- boniferous Period and preceded the Triassic Period , Permian ...
... Period 14:96 , the geologic period that began 280,000,000 years ago and lasted 55,000,000 years ; during this final period of the Paleozoic Era , which followed the Car- boniferous Period and preceded the Triassic Period , Permian ...
Other editions - View all
The New Encyclopaedia Britannica: Micropaedia: ready reference and index. 10 v No preview available - 1981 |
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19th century Abbasid Africa agricultural American ancient animal Arabic became British caliph called capital cell centimetres central centre Christian church classification clude colour County courtesy cultural district dynasty early east eastern Egypt English established fish France French German Greek illus important India industry influence Islām Islamic island Japanese king kingdom known Lake land language later major ment military modern Moravia Mosul motets mountain movement Muḥammad Murji'ah muscle Museum Muslim Nabataean nāgas Nan-ning National northern organization origin painting party passim plant poet political popular prelim production province region reigned religious Republic River Roman Russian Śiva southeast southern Soviet Spain Spanish species sq km structure style text article covers theatre theory tion tissue town traditional ture Umayyad University West Germany western World World War II