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The hot comb was an invention developed in France as a way for women with coarse curly hair to achieve a fine straight look traditionally modeled by historical Egyptian women. [44] However, it was Annie Malone who first patented this tool, while her protégé and former worker, Madam C. J. Walker , widened the teeth.
1930: Concepción Mendizábal Mendoza became the first woman in Mexico to earn a civil engineering degree. [186] 1932: Michiyo Tsujimura became the first Japanese woman to earn a doctorate in agriculture. She studied at the Tokyo Imperial University, and her doctoral thesis was entitled "On the Chemical Components of Green Tea". [187]
Evelyn Leland (c.1870–c.1930), American astronomer working at the Harvard College Observatory; Priyamvada Natarajan, Indian/American astrophysicist; Carolyn Porco (born 1953), American planetary scientist; Cecilia Payne-Gaposchkin (1900–1978), British-American astronomer; Ruby Payne-Scott (1912–1981), Australian radio astronomer
Isabella Bird Bishop (1831–1904), British natural historian; Priscilla Susan Bury (1799–1872), English botanist; Albertina Carlsson (1848–1930), Swedish zoologist; Mary Agnes Meara Chase (1869–1963), American biologist; Cornelia Clapp (1849–1934), American zoologist; Anna Botsford Comstock (1854–1930), American natural historian
The timeline begins at the Bronze Age, as it is difficult to give even estimates for the timing of events prior to this, such as of the discovery of counting, natural numbers and arithmetic. To avoid overlap with timeline of historic inventions , the timeline does not list examples of documentation for manufactured substances and devices unless ...
In the late 1800s and early 1900s, a new breed of women started to emerge from the depths of circus tents around the world: the strong-woman. These women quickly drew large crowds of circus lovers ...
1900 Fly swatter. A fly swatter is a hand-held device for swatting and killing flies and other insects. The first modern fly-destruction device was invented in 1900 by Robert R. Montgomery, an entrepreneur based in Decatur, Illinois. [75] On January 9, 1900, Montgomery was issued U.S. patent #640,790 for the "Fly-Killer". [76] 1900 Thumbtack
The following articles cover the timeline of United States inventions: Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War