Journal of the Elisha Mitchell Scientific Society, Volumes 21-23Elisha Mitchell Scientific Society, 1905 - Natural history Vols. 20- include Proceedings of the North Carolina academy of science, 1902- |
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acetic acid adulterated alcohol American angles anharmonic ratio atomic benzene Bertie Bertie county body Brimley brown cells cellulose cent Chapel Hill Chem chemical chloride color constant corundum critical temperature cubic surface Currituck determinations diseases double-six eggs ELISHA MITCHELL energy equation Ethyl Ethyl formate feet forests G. B. Halsted GENUS geometry given gold grams granite heat inches intersect investigation Iophon larvæ liquid loreal Mammals mass Math method mill Mitchell county mole molecular attraction molecules non-Euclidian geometry North Carolina obtained occur oxide paper particles peridotites plane plant plate Raleigh rock rosin Salamander sand schists septa shell side Snake soil solution species specimens spicules sponges spots straight line stripes substances sulphate tail teeth theorem thorium tion trees turpentine twenty-seven lines vapor pressure vary weight yellow
Popular passages
Page 72 - And he gave it for his opinion, " that whoever could make two ears of corn, or two blades of grass, to grow upon a spot of ground, where only one grew before, would deserve better of mankind, and do more essential service to hist country, than the whole race of politicians put together.
Page 11 - Georgia, South Carolina, North Carolina, Virginia, Maryland, Delaware, Pennsylvania, New Jersey, New York...
Page 80 - A pipe is then cemented into the hole and connected by means of a globe valve to an air pipe line from an air compressor. Compressed air at...
Page 2 - That is, the attractive forces, whatever their nature, whether chemical, molecular, magnetic, electrical, or gravitational, which proceed from a particle are definite in amount. If this attraction is exerted upon another particle the amount of the attraction remaining to be exerted upon other particles is diminished by an exactly equivalent amount.
Page 8 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.
Page 14 - ... occur in portions of the belt in North Carolina makes it quite probable that many, if not all, of these amphiboliferous types have had a like origin. Chapter vi deals with the mineralogy and technology of corundum, including its crystallography, its physical and chemical properties, its applications in the arts, and an outline of the process of manufacture of the several types of corundum and emery wheels on the market. Chapter vii, on modes of occurrence, shows corundum to be a constituent of...
Page 68 - These processes of change, as noted above, are dependent very largely upon the actual movements, warpings and foldings as one might say, of the earth's crust and the heat and chemical action which is thereby generated, and since these movements take place only with extreme slowness, whole geologic ages being occupied in their inception and completion, it follows as a matter of course that these metamorphic rocks, these gneisses, marbles and roofing slates, are found only among the older rocks and...
Page 5 - I should not wish to use words which may seem to reach too far, but I often find the conviction forced upon me that the increase of mathematical knowledge is a necessary condition for the advancement of science, and, if so, a no less necessary condition for the improvement of mankind. I could not augur well for the enduring intellectual strength of any nation of men, whose education was not based on a solid foundation of mathematical learning, and whose scientific conceptions, or, in other words,...
Page 19 - Lobachevski succeeded in building a logical edifice as coherent as the geometry of Euclid, but in which the famous postulate is assumed false, and in which the sum of the angles of a triangle is always less than two right angles.
Page 11 - ... is eight miles to the inch and the base is printed in three colors. On this the preCambrian gneisses and schists and the Cambrian ( ?) metamorphic sediments are represented by tints, while the peridotite dikes and localities of corundum, chromite, and asbestos are shown in bright red. Following the descriptions of these rocks throughout the Appalachian region, the distribution and petrographic characters are given in detail for western North Carolina. Sixty photomicrographs illustrate the mineralogic...