Proceedings of the Academy of Natural Sciences of Philadelphia, Bind 9

Forsideomslag
Academy of Natural Sciences of Philadelphia, 1858
0 Anmeldelser
Anmeldelserne verificeres ikke af Google, men Google tjekker indholdet og fjerner det, hvis det er falsk.
"Publications of the Academy of Natural Sciences of Philadelphia": v. 53, 1901, p. 788-794.
 

Hvad folk siger - Skriv en anmeldelse

Vi har ikke fundet nogen anmeldelser de normale steder.

Indhold

Andre udgaver - Se alle

Almindelige termer og sætninger

Populære passager

Side 218 - Notes explanatory of a map and section, illustrating the geological structure of the country bordering on the Missouri river, from the mouth of the Platte to Fort Benton in latitude 47° 30' N., longitude 110° 30
Side 218 - Descriptions of six New Species of Uniones, | from Alabama. | Descriptions of eight New Species of Naiades, | from various parts of the United States.
Side 190 - Descriptions of new species of reptiles collected by the US Exploring Expedition, under the command of Capt. Charles Wilkes, USN Second Part.
Side 180 - ... heavy, broad, white, hardly reflected, near the basal extremity, quite on the edge, armed with two short, incurving teeth, separated by a small, rounded sinus; on the columella there is a tooth-like fold, square, projecting across the aperture, its extremities joining those of the peristome.
Side 184 - Animal twice as long as the breadth of the shell, dark slate color, almost black on the head and tentacles; a black line running along each side of the back from the base of the longer tentacles ; body covered with compressed granules ; tentacles black, acutely pointed ; eyes at the base of superior tentacles ; anatomy believed to resemble, somewhat, that of the Lymniadte.
Side 101 - G-tiSb, which is too low; but owing to the numerous fissures through the meteorite filled with limonite, it was impossible to obtain the exact specific gravity of the metal. I used particular care to obtain a portion free from the flaws, but without effect. I take this opportunity to express my thanks to Dr. Genth for allowing me the use of his laboratory in making the examination. The following is the result of my analysis: — 1-9421 grm.
Side 14 - It has the advantage of being worked like silver in a pure state, possessing, however, greater hardness, and being capable of a higher polish. Ten parts of aluminium and ninety parts of copper produce an alloy of a pale gold color, possessing great hardness and considerable malleability ; its hardness is greater than that of bronze, in the proportion of fifty-one to forty-nine. It can be worked when warm, with the same facility as the best soft iron. Twenty parts of aluminium and eighty of copper,...
Side 182 - Say. It is readily distinguished from that and all other described species by the umbilicus, broad at the commencement and rapidly narrowing beyond the second whorl, with the peculiar groove visible in all the whorls of the umbilicus, of the same character as that noticed by Say in auriculata, though deeper. The name tholus is derived from the resemblance of the slightly raised, rounded spire to a low dome. Jaw with about 15 adjoining, broad ribs, denticulating either margin. The lingual membrane...
Side 115 - ... and spent two years in exploring it, mainly at his own expense, although he was aided a portion of the time by gentlemen connected with the American Fur Company. During these two years he traversed the Missouri River to Fort Benton, and the Yellowstone to the mouth of the Big Horn River, and explored considerable portions of the Bad Lands of White River and other districts not immediately bordering upon the Missouri. The large collections of fossils he made, were given partly to the Academy of...
Side 109 - Measures before referred to. Its first exposure seen along the Missouri is at Wood's Bluffs, right bank, about eighty miles above the mouth of the Platte, and it dips beneath the water level of the Missouri, a few miles below the mouth of the Vermilion. Its general character is a coarse grained, friable sandstone, very ferruginous, of a yellow or reddish yellow color, with thin beds of impure lignite aud various colored clay.

Bibliografiske oplysninger