The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
From inside the book
Results 1-3 of 71
Page 243
... known in the spectrum of the Earth's upper atmosphere . A third excitation process was worked out by Bowen in 1934 : it is known as Bowen fluorescence . The strongest line of the helium ion , at 304 A , is emitted by the nebula , and ...
... known in the spectrum of the Earth's upper atmosphere . A third excitation process was worked out by Bowen in 1934 : it is known as Bowen fluorescence . The strongest line of the helium ion , at 304 A , is emitted by the nebula , and ...
Page 385
... known rich and varied assemblage of fossil animals , all of which were essentially soft- bodied . Rocks of similar age also occur in the Peake and Denison ranges west of Lake Eyre , in the Amadeus Ba- sin , and on the margins of the ...
... known rich and varied assemblage of fossil animals , all of which were essentially soft- bodied . Rocks of similar age also occur in the Peake and Denison ranges west of Lake Eyre , in the Amadeus Ba- sin , and on the margins of the ...
Page 1060
... known as Ichthyornis and Apatornis . Although not related to gulls , these birds re- sembled them superficially and ... known species in a given geological period in terms of the duration of the period . About 35 species of birds are ...
... known as Ichthyornis and Apatornis . Although not related to gulls , these birds re- sembled them superficially and ... known species in a given geological period in terms of the duration of the period . About 35 species of birds are ...
Other editions - View all
Common terms and phrases
aesthetic ancient appear areas arms artists aschelminths Asia Asian associated atmosphere atoms become body called Central centre century changes China continued countries criticism culture early Earth East economic effect electrons elements energy example exist field forces France function Games groups head human important increase India individual industrial influence Italy Japan known later less light lines living lower major mass means ment metres military mountain nature North objects observations occur organization original painting particular percent period physical Pleistocene political population position possible practice present produced radiation range region relatively remains represent result schools social society sometimes sources South Soviet species stars structure style surface temperature theory tion traditional types United usually various West western