Proceedings of the American Academy of Arts and Sciences, Volumen7Metcalf 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
... bases , each face of the base being a rhomb , the greater angles of which were 109 ° 28 ' , and the lesser 70 ° 32 ' . * Twenty - five years later , Reaumer , the most admirable of the observers of insect life , with the view of ...
... bases , each face of the base being a rhomb , the greater angles of which were 109 ° 28 ' , and the lesser 70 ° 32 ' . * Twenty - five years later , Reaumer , the most admirable of the observers of insect life , with the view of ...
Página 72
... base of the cell , where they are thin- nest and the angles sharpest . These sections were obtained by filling the cells with plaster of Paris , and after this had hardened , cutting them down to the required point . In this way , all ...
... base of the cell , where they are thin- nest and the angles sharpest . These sections were obtained by filling the cells with plaster of Paris , and after this had hardened , cutting them down to the required point . In this way , all ...
Página 73
... base . This fact is the more noteworthy , since it is upon these , and the angles they make with each other and the sides , that rests the nicest part of the problem relating to the adaptation of the cell to the contained bee . The ...
... base . This fact is the more noteworthy , since it is upon these , and the angles they make with each other and the sides , that rests the nicest part of the problem relating to the adaptation of the cell to the contained bee . The ...
Página 74
... base is viewed , and the second when looked at per- pendicularly to one of the sides . In both figures A indicates the ordinary form of the cell . The whole se- ries of Fig . 1 shows the gradual introduction of the new face , which is ...
... base is viewed , and the second when looked at per- pendicularly to one of the sides . In both figures A indicates the ordinary form of the cell . The whole se- ries of Fig . 1 shows the gradual introduction of the new face , which is ...
Página 75
... base is cut off , they are shortened by an amount equal to the height of that of the base , and therefore are of a proportionately less capacity than the normal cell . Nevertheless , such truncated cells are used for rearing the young ...
... base is cut off , they are shortened by an amount equal to the height of that of the base , and therefore are of a proportionately less capacity than the normal cell . Nevertheless , such truncated cells are used for rearing the young ...
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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.