gravity prospecting
21hand tool — any tool or implement designed for manual operation. * * * Introduction any of the implements used by craftsmen in manual operations, such as chopping, chiseling, sawing, filing, or forging. Complementary tools, often needed as auxiliaries to… …
22Azurite — may also refer to a blue Green fluorescent protein derivative. For the DFPSO vessel, see Azurite DFPSO. Azurite Azurite from China with large crystals and light surface weathering. General …
23Torsion spring — A mousetrap powered by a helical torsion spring A torsion spring is a spring that works by torsion or twisting; that is, a flexible elastic object that stores mechanical energy when it is twisted. The amount of force (actually torque) it exerts… …
24Comstock Lode — Bonanza ore, Consolidated California and Virginia Mine, Comstock Lode The Comstock Lode was the first major U.S. discovery of silver ore, located under what is now Virginia City, Nevada, on the eastern slope of Mount Davidson, a peak in the… …
25Liviu Constantinescu — (26 November 1914 – 29 November 1997) was a Romanian geophysicist, professor of geophysics, member of the Romanian Academy. He was the cofounder, together with Sabba S. Ştefănescu, of the Romanian school of geophysics.BiographyBorn into an old… …
26gravimeter — /greuh vim i teuhr/, n. 1. an instrument for measuring the specific gravity of a solid or liquid. 2. Also called gravity meter. an instrument for measuring variations in the gravitational field of the earth by detecting differences in weight of… …
27Triplanetary — was a science fiction board wargame published by Game Designers Workshop in 1973. It was a simulation of space combat within the solar system in the early 21st Century. The game was designed by Marc W. Miller as part of a series to be named The… …
28Gold — This article is about the metal. For the color, see Gold (color). For other uses, see Gold (disambiguation). platinum ← gold → mercury …
29Rosneft — Not to be confused with Russneft. Rosneft Роснефть Type public Traded as RTS:ROSN …
30exploration — /ek spleuh ray sheuhn/, n. 1. an act or instance of exploring or investigating; examination. 2. the investigation of unknown regions. [1535 45; < L exploration (s. of exploratio) an examination, equiv. to explorat(us) searched out, examined (ptp …
