Proceedings of the American Association for the Advancement of Science, Volume 6 |
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Common terms and phrases
Albany Alpha Arietis alumina amalgam ammonia analyses angle appears Association atmosphere atoms average ball body Boston[1 carbonic acid Charleston cloud cloud-ring coefficient color crystals deduced diameter direction discharge distance diurnal curve earth effect electrical elongation equal equation equinox experiment feet Fort Simpson Gamma Virginis geometrical unit grammes phosphoric acid heat height hydrochloric acid inches iron Lake Athabasca lead less magnesia magnetic Massachusetts maximum ordinates mean measure meeting mercury meteoric mineral months moon's declination motion multiplicand multiplier muskmelon nearly negative New-Haven New-York observations operation oscillation period perpendicular phenomena Philadelphia portion position precipitate primitive axis Prof quantity radius rain remarkable retina rock semidiurnal curve silica sine Sitka soda soluble space species specific gravity specimens square surface syphon tion tube unit unity urine vapor velocity vertex winds zero zodiacal light
Popular passages
Page x - Association are, by periodical and migratory meetings, to promote intercourse between those who are cultivating science In different parts of America, to give a stronger and more general impulse and more systematic direction to scientific research, and to procure for the labors of scientific men increased facilities and a wider usefulness.
Page 395 - One important part of Guyot's meteorological labors consisted in the selection and establishment of meteorological stations. With this object in view, he made in 1849 and 1850, under the direction of the regents of the University of New York, in conjunction with the Smithsonian Institution, a general orographie study of the State of New York in order to ascertain the best locations for such stations.
Page 297 - The residue of the soil left upon the filter, consisting chiefly of silica and alumina, was found, after drying, in every instance, to be more or less stratified, and that too by divisional planes in some cases not at all coincident with any division of the materials, although this is apt to take place. The strata so produced...
Page 298 - ... in which they are included, exhibit the slightest tendency to break or divide in any one direction more than another. The observations here stated, I am happy to find, have been also noticed to some extent by others conversant with the subject of stratification. Sawdust, subjected to the filtering action of water, has been observed by Prof. AGASSIZ to assume a regular stratified appearance. The same has also been noticed by Dr. HAYES of Boston, in the vats into which clay, used for the manufacture...
Page 279 - It may be that the question suggested by my researches has no bearing upon the Dead Sea ; that local elevations and subsidences alone were concerned in placing the level of its waters where it is. But is it probable that, throughout all the geological periods, during all the changes which have taken place in the distribution of land and water surface over the earth, the winds, which in the general channels of circulation pass...
Page 208 - The facts presented in the furnished specimens are as follows : The rock formed under water exclusively is composed of grains of size less than that of a mustard seed, which, to the naked eye, appear quite globular and of uniform diameter. More carefully examined with a microscope, they are found to be far from regular in form or uniform in size, but present numerous depressions and prominences. Distributed throughout the intervening spaces is a fine deposit of carbonate of lime, which adheres with...
Page 208 - It is well known that calcareous springs deposit carbonate of lime in crystalline forms. The salt had been held in solution by carbonic acid contained in the water. Upon reaching the surface under less pressure and the influence of a high temperature, its carbonic acid is given up, and with it a precipitate of carbonate of lime takes place.
Page 393 - Resolved, That a copy of these resolutions, signed by the President and Secretary of this Board, be forwarded to the family of Mr. Starr.
Page 161 - ... from the sun's rays, not only promotes the precipitation which takes place within these parallels at certain periods, but how, also, the rains are made to change the places upon which they are to fall ; and how, by travelling with the calm belt of the equator up and down the earth, this cloudring shifts the surface from which the heating rays of the sun are to be excluded ; and how, by this operation, tone is given to the atmospherical circulation of the world, and vigour to its vegetation.
Page 287 - And, admitting the vapor springs for that valley to be situated in the direction supposed, the rising up of a continent from the bottom of the sea, or the upheaval of a range of mountains across their route in certain parts of America, ^. Africa, or Spain, might have been sufficient to rob the air of the moisture which it was wont to carry away and precipitate upon this great inland basin. See how the Andes have made Atacama a desert, and of Western Peru a rainless country, simply by the rising of...