Proceedings of the American Philosophical Society Held at Philadelphia for Promoting Useful Knowledge, Band 32American Philosophical Society., 1894 |
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Seite 27
... whorl presses upon and obliges the outer whorl to form this depression on the inner side . When the shell gets old the whorl quits the spiral and grows out straight , and when that period begins . in old age this depression , which is ...
... whorl presses upon and obliges the outer whorl to form this depression on the inner side . When the shell gets old the whorl quits the spiral and grows out straight , and when that period begins . in old age this depression , which is ...
Seite 407
... whorl with the venter of the already formed whorl of the next inner volution . This is either flat , gibbous , or indented in accordance with the form of the venter of the whorl it touches or envelopes , but it is usually indented more ...
... whorl with the venter of the already formed whorl of the next inner volution . This is either flat , gibbous , or indented in accordance with the form of the venter of the whorl it touches or envelopes , but it is usually indented more ...
Seite 408
... whorl . Thus the tetragonal whorl , with an outline similar to that of an inverted trapezoid in section , and consequently an obvious repetition of the ephebic whorl of Temnocheilus , and with sutures . also like those of the adults of ...
... whorl . Thus the tetragonal whorl , with an outline similar to that of an inverted trapezoid in section , and consequently an obvious repetition of the ephebic whorl of Temnocheilus , and with sutures . also like those of the adults of ...
Seite 409
... whorl which , during the preceding substage , had lost the subtrigonal outline of the para- nepionic and become kidney - shaped in outline , with a deep im- pressed zone , now acquires a deeper impressed zone and slightly flattened ...
... whorl which , during the preceding substage , had lost the subtrigonal outline of the para- nepionic and become kidney - shaped in outline , with a deep im- pressed zone , now acquires a deeper impressed zone and slightly flattened ...
Seite 423
... whorl at any stage . The " lateral zones " and lateral faces , etc. , as will be seen in the descriptions , are developed as modifications out of the sides of the young and immature whorls . The outer angles occurring on either side in ...
... whorl at any stage . The " lateral zones " and lateral faces , etc. , as will be seen in the descriptions , are developed as modifications out of the sides of the young and immature whorls . The outer angles occurring on either side in ...
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Häufige Begriffe und Wortgruppen
abdomen amber AMER Ammonoidea Ammonoids ananeanic substage ananepionic aperture apex Aphetoceras apical appears arcuate auxiliary vein Barrande Cenoceras characteristics characters Cladura closely coiled contact furrow costa cross vein described diameter discal cell distinct dorsal furrow dorsal lobes dorsum electrical ephebic stage Estonioceras Eutrephoceras femora figured Florissant fossil genera genus gerontic gerontic stage gyroceran Heer hind femora hyponomic impressed zone involution Kaiser legs Length of wings lines of growth Lituites living chamber Loew long as broad longitudinal vein magnet marginal cell metanepionic substage Nautiloidea Nautiloids Nautilus Nautilus pompilius neanic stage nepionic stage Nostoceras observed ontogeny Osten Sacken outline paranepionic substage PHILOS plates posterior cell præfurca PROC Prof protoconch Ptychoceras Radoboj saddles Schroederoceras septa septum shown Silurian similar siphuncle Society species specimen sutures tertiary tibiæ tion Tipula transverse Trocholites tubercles umbilical perforation umbilical zones venter ventral ventro-dorsal volution whorl XXXII young
Beliebte Passagen
Seite 104 - Society of London, a present of a glass tube with some account of the use of it in making such experiments. I eagerly seized the opportunity of repeating what I had seen at Boston; and, by much practice...
Seite 110 - Make a small cross of two light strips of cedar, the arms so long as to reach to the four corners of a large thin silk handkerchief when extended ; tie the corners of the handkerchief to the extremities of the cross, so you have the body of a kite ; which, being properly accommodated with a tail, loop, and string, will rise in the air, like those made of paper; but this being of silk is fitter to bear the wet and wind of a thundergust without tearing.
Seite 108 - Chagrined a little that we have been hitherto able to produce nothing in this way of use to mankind ; and the hot weather coming on, when electrical experiments are not so agreeable, it is proposed to put an end to them for this season somewhat humorously in a party of pleasure on the banks of Skuylkil. Spirits, at the same time, are to be fired by a spark sent from side to side through the river, without any other conductor than the water ; an experiment which we some time since performed to the...
Seite 242 - On three several Hurricanes of the Atlantic, and their Relations to the Northers of Mexico and Central America, with Notices of other Storms.
Seite 103 - Collinson, Fellow of the Royal Society of London, a present of a glass tube, with some account of the use of it in making such experiments.
Seite 113 - I have never entered into any controversy in defence of my philosophical opinions; I leave them to take their chance in the world. If they are right, truth and experience will support them ; if wrong, they ought to be refuted and rejected.
Seite 109 - A turkey is to be killed for our dinner by the electrical shock, and roasted by the electrical jack, before a fire kindled by the electrified bottle; when the healths of all the famous electricians in England, Holland, France, and Germany are to be drank in electrified bumpers, under the discharge of guns from the electrical battery.
Seite 258 - Report of the Chief Signal Officer to the Secretary of War for the year ending June 30, 1871.
Seite 113 - The king's changing his pointed conductors for blunt ones is, therefore, a matter of small importance to me. If I had a wish about it, it would be that he had rejected them altogether as ineffectual. For it is only since he thought himself and family safe from the thunder of heaven that he dared to use his own thunder in destroying his innocent subjects...
Seite 128 - ... a current from a trough, if not increased, is but slightly diminished in passing through a long wire is certain. . . . " But be this as it may, the fact that the magnetic action of a current from a trough is, at least, not sensibly diminished by passing through a long wire is directly applicable to Mr.