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Unable to find work as an engineer, Clarke went to work for General Electric as a supervisor of computers in the Turbine Engineering Department. During this time, she invented the Clarke calculator, [1] an early graphing calculator, a simple graphical device that solved equations involving electric current, voltage and impedance in power transmission lines.
The electric motor brings on the first juke box with cylinders – even before flat disk records were widely available. Thomas Edison discovers thermionic emission. This effect forms the basis for the vacuum tube and the cathode ray tube.
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.
Although the terms engineer and engineering date from the Middle Ages, they acquired their current meaning and usage only recently in the nineteenth century. Briefly, an engineer is one who uses the principles of engineering – namely acquiring and applying scientific, mathematical, economic, social, and practical knowledge – in order to design and build structures, machines, devices ...
William Sturgeon invented the electromagnet in 1825. [19] Electromagnets were then used in the first practical engineering application of electricity by William Fothergill Cooke and Charles Wheatstone who co-developed a telegraph system that used a number of needles on a board which were moved to point to letters of the alphabet. A five needle ...
Ted Bundy was one of the most notorious serial killers in history. He murdered more than 30 women between the years of 1974 and 1978, according to Biography.. In 1989, The 42-year-old "lady killer ...
1794: British chemist Elizabeth Fulhame invented the concept of catalysis and published a book on her findings. [64] c. 1796–1820: During the reign of the Jiaqing Emperor, astronomer Huang Lü became the first Chinese woman to work with optics and photographic images. She developed a telescope that could take simple photographic images using ...
From ancient history to the modern day, the clitoris has been discredited, dismissed and deleted -- and women's pleasure has often been left out of the conversation entirely. Now, an underground art movement led by artist Sophia Wallace is emerging across the globe to challenge the lies, question the myths and rewrite the rules around sex and the female body.