Proceedings of the American Academy of Arts and Sciences, Volume 7Metcalf and Company, 1868 Vol. 12 (from May 1876 to May 1877) includes: Researches in telephony / by A. Graham Bell. |
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Página 68
... Cells of the Bee . Ir is more than a century and a half since Maraldi studied the form of the cells of the hive bee , and described them as hexagonal prisms with trihedral bases , each face of the base being a rhomb , the greater angles ...
... Cells of the Bee . Ir is more than a century and a half since Maraldi studied the form of the cells of the hive bee , and described them as hexagonal prisms with trihedral bases , each face of the base being a rhomb , the greater angles ...
Página 69
... Cells of Bees , after having himself solved Reaumer's problem , after having obtained solutions of it through others , and after having himself measured the cells , asserts positively that they are constructed in accordance with the ...
... Cells of Bees , after having himself solved Reaumer's problem , after having obtained solutions of it through others , and after having himself measured the cells , asserts positively that they are constructed in accordance with the ...
Página 70
... cell is rarely , perhaps never , realized . For , while the deviations from the true form do not exceed a certain limit , a piece of comb , ten cells square , can hardly be found in which one or more irregularities do not occur , of ...
... cell is rarely , perhaps never , realized . For , while the deviations from the true form do not exceed a certain limit , a piece of comb , ten cells square , can hardly be found in which one or more irregularities do not occur , of ...
Página 71
... cells was 2.10 inches , and the least 1.85 inches , making a difference of 0.25 inch , or the diameter of a cell and a quarter . The average difference is , however , a little less than 0.10 inch . These irregularities do not accumulate ...
... cells was 2.10 inches , and the least 1.85 inches , making a difference of 0.25 inch , or the diameter of a cell and a quarter . The average difference is , however , a little less than 0.10 inch . These irregularities do not accumulate ...
Página 72
... cells shorter , and the others proportionally longer . To test this , cells from six dif- ferent pieces of comb were measured in the direction of their three diameters ; the result was , that the aggregate transverse diameters of 570 cells ...
... cells shorter , and the others proportionally longer . To test this , cells from six dif- ferent pieces of comb were measured in the direction of their three diameters ; the result was , that the aggregate transverse diameters of 570 cells ...
Outras edições - Ver tudo
Proceedings of the American Academy of Arts and Sciences, Volume 42 American Academy of Arts and Sciences Visualização integral - 1907 |
Proceedings of the American Academy of Arts and Sciences, Volume 43 American Academy of Arts and Sciences Visualização integral - 1908 |
Proceedings of the American Academy of Arts and Sciences, Volume 41 American Academy of Arts and Sciences Visualização integral - 1906 |
Palavras e frases frequentes
4to pamph 66 daughter 66 female 8vo pamph 8vo vol Acad Academy acutis antheræ ANTIRRHINUM apice basi Beech Benth Bolander Boston Boston Athenæum Brack bracteis bracts breadth brevibus brevioribus breviter brothers and sisters calycis Calyx capsula caule cells chloride chlorine Class CORDYLANTHUS corolla dentibus diameter Expl father feet fere filamentis floribus flowers foliis foliolis Freyc Gaud genus glabra grandson granddaughter Gray Hawaiian Hawaiian Islands Hook inches long integerrimis involucri Islands Kauai lanceolatis leaves linearibus lines long Linn Linnæa lobis loculis longioribus male Maui Mountains not-P Nutt Oahu Mann oblongis obtusis ovalibus ovario ovatis oxide paullo pedicellis pedicels pedunculis petalis petiolatis petiole petiolum PHYLLOSTEGIA plant predicate premise President Prodr Professor proposition quadrics relation Remy Resident Fellow sæpius SANDWICENSIS segmentis sepalis sepals Society species specimens squamis subtus term tion tubo Turanian Yosemite Valley
Passagens conhecidas
Página 130 - The Vegetable Kingdom, or the Structure, Classification, and Uses of Plants, illustrated upon the Natural System.
Página 496 - Two reports have recently been issued on rates of deck watches and of box and pocket chronometers on trial for purchase by the Board of Admiralty at the Royal Observatory, Greenwich, in the latter half of last year.
Página 16 - Report of the Astronomer Royal to the Board of Visitors of the Royal Observatory, Greenwich, read at the Annual Visitation of the Royal Observatory, 1860, June 2; and Address of the Astronomer Royal to the Board of Visitors, 1860, May 12.
Página 26 - Statistics of the Foreign and Domestic Commerce of the United States. .... Communicated by the Secretary of the Treasury, in Answer to a Resolution of the Senate of the United States, March 12, 1863.
Página 28 - An address delivered at the anniversary meeting of the Geological Society of London, on the 19th of February, 1841 ; and the announcement of the award of the Wollaston medal and donation fund for the same year.
Página 507 - ANNUAIRE DE CHIMIE, comprenant les applications de cette science à la médecine et à la pharmacie, ou Répertoire des découvertes et des nouveaux travaux en chimie faits dans les diverses parties de l'Europe ; par MM. E.
Página 311 - THE GEOLOGY OF PENNSYLVANIA: A Government Survey ; with a General View of the Geology of the United States, Essays on the Coal- Formation and its Fossils, and a Description of the Coal-Fields of North America and Great Britain.
Página 13 - Report to the Legislature of Massachusetts relating to the Registry and Return of Births, Marriages and Deaths in the Commonwealth for the year ending December 31, 1880.
Página 14 - Annual Report of the Trustees of the Museum of Comparative Zoology at Harvard College, in Cambridge, together with the Report of the Director, 1864.
Página 47 - ... cylinders, welded together endwise. Each ring was made of bars wound upon an arbor spirally, like winding a ribbon upon a block, and, being welded and shaped in dies, were joined endwise, when in the furnace and at a welding heat, and afterwards pressed together in a mould, by a hydrostatic press of 1,000 tons force.