Memoirs of the National Academy of Sciences, Τόμος 2

Εξώφυλλο
U.S. Government Printing Office, 1884
Each volume comprises one or more monographs, many of which are issued also as separates.
 

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Σελίδα 20 - ... were admirable. It is excusable to grow enthusiastic over the infinite numbers of organic beings with which the sea of the tropics, so prodigal of life, teems...
Σελίδα 20 - ... to break the violence of the open sea. Excepting near the lagoon, where there is some sand, the land is entirely composed of rounded fragments of coral. In such a loose, dry, stony soil, the climate of the intertropical regions alone could produce a vigorous vegetation.
Σελίδα 19 - It is necessary to sail over this great ocean to comprehend its immensity. Moving quickly onwards for weeks together, we meet with nothing but the same blue, profoundly deep, ocean. Even within the archipelagoes, the islands are mere specks, and far distant one from the other. Accustomed to look at maps drawn on a small scale, where dots, shading, and names are crowded together, we do not rightly judge how infinitely small the proportion of dry land is to water of this vast expanse.
Σελίδα 20 - ... forms a lofty sub-marine mountain, with sides steeper even than those of the most abrupt volcanic cone. The saucer-shaped summit is nearly ten miles across; and every single atom,* from the least particle to the largest fragment of rock, in this great pile...
Σελίδα 20 - ... land is entirely composed of rounded fragments of coral. In such a loose, dry, stony soil, the climate of the intertropical regions alone could produce a vigorous vegetation. On some of the smaller islets, nothing could be more elegant than the manner in which the young and full-grown cocoa-nut trees, without destroying each other's symmetry, were mingled into one wood. A beach of glittering white sand formed a border to these fairy spots.
Σελίδα 226 - the evidence shows a tendency to the formation of a deaf variety of the human race in America," on the one hand, to that of the Commissioners of the Irish census of 1881, that "it appears evident that the question of deafness and dumbness in parents has no influence in propagating the defect." Mr. Fay's inquiry commenced in 1889, and the work has continued uninterruptedly since that time. Exhaustive...
Σελίδα 20 - ... illumined by a vertical sun, of the most vivid green. This brilliant expanse, several miles in width, is on all sides divided, either by a line of snowwhite breakers from the dark heaving waters of the ocean, or from the blue vault of heaven by the strips of land, crowned by the level tops of the cocoa-nut trees. As a white cloud here and there affords a pleasing contrast with the azure sky, so in the lagoon, bands of living coral darken the emerald green water.
Σελίδα 83 - The calorie is the amount of heat necessary to raise the temperature of one gram of water one degree centigrade.
Σελίδα 221 - It is now well known that those whom we term "deafmutes" have no other natural defect save that of deafness. They are simply persons who are deaf from childhood, and many of them are only hard of hearing. The lack of articulate speech which has led to their denomination as "mutes" results from lack of instruction, and not from any defect of the vocal organs. No one naturally acquires without instruction a language he has never heard. But, if children who are born deaf or hard of hearing do not naturally...
Σελίδα 160 - Fig. 4, be a very small wave-length interval on the prismatic scale ; c, the same interval on the normal scale, and b and d the average heights of the energy curves over the two intervals, respectively ; the shaded part of the figure representing, therefore, the portion of the total area included between these limits, ef is a portion of the curve EF, Fig.

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