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abdomen amber Ammonoidea Ammonoids ananeanic substage ananepionic aperture apex Aphetoceras apical appears arcuate auxiliary vein Barrande become Cenoceras centre characteristics characters cicatrix Cladura closely coiled contact furrow costations cross vein described discal cell distinct dorsal furrow dorsal lobes dorsum electrical ephebic stage Estonioceras femora figured Florissant fossil genera genus gerontic gerontic stage Gonomyia gyroceran Heer hind femora hyponomic impressed zone involution Kaiser Köprülü lateral lobes legs Length of wings less lines of growth Lituites living chamber Loew long as broad longitudinal vein magnet marginal cell metanepionic substage Nautiloidea Nautiloids Nautilus neanic stage nepionic stage Nostoceras observed ontogeny Osten Sacken outline paranepionic substage plates posterior cell praefurca Prof protoconch Ptychoceras Radoboj saddles Schroederoceras septa septum shown shows Silurian similar siphuncle Society species specimen sutures tertiary tibiae tion Tipula transverse Trocholites tubercles umbilical perforation umbilical zones venter Vezier volution whorl XXXII young
Pagina 110 - ... 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 amazement of many.
Pagina 252 - On Three Several Hurricanes of the Atlantic, and their Relations to the Northers of Mexico and Central America.
Pagina 105 - 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.
Pagina 115 - While you, Great George, for safety hunt, And sharp conductors change for blunt, The empire's out of joint. Franklin a wiser course pursues, And all your thunder fearless views By keeping to the point.
Pagina 115 - 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.
Pagina 268 - Report of the Chief Signal Officer to the Secretary of War for the year ending June 30, 1871.
Pagina 115 - 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...
Pagina 155 - Observations to determine the magnetic dip at Baltimore, Philadelphia, New York, West Point, Providence, Springfield, and Albany, (made jointly with Professor EH Courtenay.) Trans.