precise determination
51Bronze Age — For other uses, see Bronze Age (disambiguation). Diffusion of metallurgy in western Europe. The darkest areas are the oldest. Bronze Age …
52Microbiology — An agar plate streaked with microorganisms …
53139 BC — NOTOC EventsBy placeChina*Emperor Wu of Han sends an envoy into Bactria, Parthia and Ferghana.Rome*The Lusitanian War ended when the rebellion collapsed after the assassination of Viriathus by a Roman agent.By topicAstronomy*Hipparchus makes a… …
54List of prizes, medals, and awards — A list of famous prizes, medals, and awards including badges, bowls, cups, state decorations, trophies, etc. Contents 1 Business and management 2 Entertainment 2.1 Advertising …
55Bytownite — is a calcium rich member of the plagioclase solid solution series of feldspar minerals. It is usually defined as having %An between 70 and 90. Like others of the series, bytownite forms grey to white triclinic crystals commonly exhibiting the… …
56Seismometer — Seismometers (from Greek Seism the shakes and Metro I measure ) are instruments that measure and record motions of the ground, including those of seismic waves generated by earthquakes, nuclear explosions, and other seismic sources. Records of… …
57Charles Marie de La Condamine — (January 28, 1701 – February 13, 1774) was a French explorer, geographer, and mathematician. He spent ten years in present day Ecuador measuring the length of a degree latitude at the equator and preparing the first map of the …
581714 in science — The year 1714 in science and technology involved some significant events.Mathematics* March Roger Cotes publishes Logometrica in the Philosophical Transactions of the Royal Society . He provides the first proof of what is now known as Euler s… …
59Undulation of the geoid — is a somewhat old fashioned name for the separation N between the geoid and the reference ellipsoid of the Earth.Because geophysical heights H above sea level refer to the geoid, but GPS positioning provides in a direct geometric fashion heights… …
60David Dunlap Observatory — The 74 inch (1.9 m) telescope at the David Dunlap Observatory Organizati …
