Laura Garwin, Tim Lincoln, Steven Weinberg's A century of Nature: twenty-one discoveries that changed PDF

By Laura Garwin, Tim Lincoln, Steven Weinberg

ISBN-10: 0226284158

ISBN-13: 9780226284156

A number of the medical breakthroughs of the 20th century have been first pronounced within the magazine Nature. A Century of Nature brings jointly in a single quantity Nature's maximum hits—reproductions of seminal contributions that modified technological know-how and the realm, observed by means of essays written via best scientists (including 4 Nobel laureates) that supply historic context for every article, clarify its insights in swish, available prose, and have fun the serendipity of discovery and the rewards of looking for needles in haystacks.

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Points to a symmetrical and balanced development of the faculties of associative memory and intelligent activity. The pithecoid type of parallel sulcus is preserved, but the sulcus lunatus has been thrust backwards towards the occipital pole by a pronounced general bulging of the parieto-temporo-occipital association areas. To emphasise this matter, I have reproduced (Fig. 6) superimposed coronal contour tracings taken at the widest part of the parietal region in the gorilla endocranial cast and in this fossil.

It is therefore reasonable to believe that the adult forms typified by our present specimen possessed brains which were larger than that of this juvenile specimen, and equalled, if they did not actually supersede, that of the gorilla in absolute size. Whatever the total dimensions of the adult brain may have been, there are not lacking evidences that the brain in this group of fossil forms was distinctive in type and was an instrument of greater intelligence than that of living anthropoids. The face of the endocranial cast is scarred unfortu- australopithecus africanus 17 nately in several places (crosshatched in the dioptographic tracing—see Fig.

We apply this formula to the electron beams without regard to the conditions which determine their distribution in co-latitude angle. The correlation obtained by this procedure between wave-length and electron speed v is set down in the last three columns of Table I. In considering the computed values of n(λmv/h), listed in the last column, we should perhaps disregard those for the 110-volt beams at the bottom of the Table, as we have had reason already to regard these beams as in some way anomalous.

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A century of Nature: twenty-one discoveries that changed science and the world by Laura Garwin, Tim Lincoln, Steven Weinberg

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