Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Том 65

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American Philosophical Society, 1926

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Сторінка xv - That one society be formed of virtuosi or ingenious men, residing in the several colonies, to be called The American Philosophical Society, who are to maintain a constant correspondence.
Сторінка 85 - Totals: 9 o i 3 0 t 4 3 2 d" 2 i 3 i 4 o i 6 time produce an occasional tufted branch and thus show itself genetically tufted. INTERRELATIONS OF CHARACTERS IN INHERITANCE. The results of the crosses of non-vegetative, non-tufted X vegetative, tufted (Table I.) are capable of being explained by the assumption that the appearance of each atypical character (vegetativeness or tuftedness) is dependent upon a single factor. Previous results (Allen, 19246) have suggested that a factorial explanation of...
Сторінка 308 - A race is a great division of mankind, the members of which, though individually varying, are characterized as a group by a certain combination of morphological and metrical features, principally non-adaptive, which have been derived from their common descent.
Сторінка xv - May new style), this being the date of the publication of his " Proposal for Promoting Useful Knowledge among the British Plantations in America." 3 That the American Society was begun under the name of the Junto, and bore this name from the year 1750, the earliest recorded date of its existence, until the 13th of December, 1766.
Сторінка xv - Philadelphia, being the city nearest the centre of the continent colonies, communicating with all of them northward and southward by post, and with all the islands by sea, and having the advantage of a good growing library, be the centre of the Society.
Сторінка 78 - Langley announced that it was possible to construct machines which would give such a velocity to inclined surfaces that bodies indefinitely heavier than the air could be sustained upon it and moved through it with great velocity.
Сторінка xv - A Society having subsisted for some time in this City under the name of the American Society held at Philadelphia for promoting and propagating useful Knowledge, whose Views have been nearly the same with those which are published of the American Philosophical Society, and it being judged that the Ends proposed by both could be carried on with more advantage to the Public if a Union could take place between them, it is proposed that such a Union may take place.
Сторінка 79 - I have brought to a close the portion of the work which seemed to be specially mine — the demonstration of the practicability of mechanical flight — and for the uext stage, which is the commercial and practical development of the idea, it is probable that the world may look to others.
Сторінка 308 - A primary race is one which has been modified only by the operation of evolutionary factors, including the selection of its own intrinsic variations and of the modifications, adaptive or non-adaptive, possibly caused by environmental stimuli. A secondary or composite race is one in which a characteristic and stabilized combination of morphological and metrical features has been effected by a long-continued intermixture of two or more primary races within an area of relative isolation.
Сторінка 113 - In view of all the features of the lowan drift, taken in connection with the fact that it stands as the third drift of the western district, as the Illinoian does of the eastern, and that each district has but four drifts, the writer raises the question whether there really were more than four Pleistocene glacial stages in North America, or 9 whether the Iowan drift should be regarded as a late phase of the third glacial stage.

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