The New Encyclopaedia Britannica, Volume 23Encyclopaedia Britannica, 1974 - Encyclopedias and dictionaries |
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Page 23
... layer that acts as a screen protecting life on the surface of Earth from most of the harmful effects of ultraviolet radiation from the Sun. Fabry joined the staff of Marseilles Universi- ty in 1894. His early studies centred on light ...
... layer that acts as a screen protecting life on the surface of Earth from most of the harmful effects of ultraviolet radiation from the Sun. Fabry joined the staff of Marseilles Universi- ty in 1894. His early studies centred on light ...
Page 305
... layers can be distinguished : a small layer , F1 , and above it a more highly ionized , dominant layer , F2 . At night they become one at about the level of the F2 layer , also called the Appleton layer . This region reflects radio ...
... layers can be distinguished : a small layer , F1 , and above it a more highly ionized , dominant layer , F2 . At night they become one at about the level of the F2 layer , also called the Appleton layer . This region reflects radio ...
Page 433
... layer formation and development 6 : 745d gastrulation , transformation of the blastula ( hollow mass of cells ) to a gastrula ( a double- layered cuplike stage ) during embryonic de- velopment . A single layer of cells , the blas ...
... layer formation and development 6 : 745d gastrulation , transformation of the blastula ( hollow mass of cells ) to a gastrula ( a double- layered cuplike stage ) during embryonic de- velopment . A single layer of cells , the blas ...
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