Search results
Results From The WOW.Com Content Network
Julia Brainerd Hall (November 11, 1859 – September 4, 1926) [1] was the sister of American scientist Charles Martin Hall. She supported him in his discovery of the Hall process for extracting aluminium from its ore. [2] She was also a still-life painter who exhibited at the Edgar Adams Gallery in Cleveland. [3]
Aluminium (or aluminum) metal is very rare in native form, and the process to refine it from ores is complex, so for most of human history it was unknown. However, the compound alum has been known since the 5th century BCE and was used extensively by the ancients for dyeing .
Charles Martin Hall (December 6, 1863 – December 27, 1914) was an American inventor, businessman, and chemist.He is best known for his invention in 1886 of an inexpensive method for producing aluminum, which became the first metal to attain widespread use since the prehistoric discovery of iron.
A major piece of evidence for the presence of dark matter in the Universe, discovered by Vera Rubin from observations of galactic rotation curves in the 1970s. Stars luminosity Henrietta Swan Leavitt was an American astronomer who discovered the relation between the luminosity and the period of Cepheid variable stars at the beginning of 20th ...
Folding "cabinet-bed", forerunner of the Murphy bed; first African-American woman to receive a patent in the United States [83] [84] [85] Grant, George F. 1846–1910 Dentist, professor The first African-American professor at Harvard, Boston dentist, and inventor of a wooden golf tee. [86] Graves, Joseph L. 1955– Evolutionary biologist [87 ...
The net worth of the richest people in the United States.
Hetty Green is remembered as the “world’s greatest miser” and the “Witch of Wall Street," but these days, Green would likely be seen as an eccentric investing icon.
These women are living life at the top. Tamara Gustavson, $5.5 Billion. The richest person in Kentucky, Tamara Gustavson can claim a top spot in America as well, thanks to the self-storage company ...