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Elmer Ambrose Sperry Sr. (October 12, 1860 – June 16, 1930) was an American inventor and entrepreneur, most famous for construction, two years after Hermann Anschütz-Kaempfe, of the gyrocompass and as founder of the Sperry Gyroscope Company. [3]
Of those who originated China's Four Great Inventions of the ancient world—the compass, gunpowder, papermaking and printing—only the inventor of papermaking, Cai Lun, is known. [81] Additionally, in comparison to other Chinese inventions such as the writing brush and ink, the development of paper is the best documented in literary sources. [6]
Hawaiian hafted tattoo instrument, mallet, and ink bowl, which are the characteristic instruments of traditional Austronesian tattooing culture Spanish depiction of the tattoos (patik) of the Visayan Pintados ("the painted ones") of the Philippines in the Boxer Codex (c. 1590), one of the earliest depictions of native Austronesian tattoos by ...
A tattoo is a form of body modification made by inserting tattoo ink, dyes, and/or pigments, either indelible or temporary, into the dermis layer of the skin to form a design. Tattoo artists create these designs using several tattooing processes and techniques , including hand-tapped traditional tattoos and modern tattoo machines .
The magnetic compass was first invented as a device for divination as early as the Chinese Han dynasty and Tang dynasty (since about 206 BC). [1] [3] [34] The compass was used in Song dynasty China by the military for navigational orienteering by 1040–44, [22] [35] [36] and was used for maritime navigation by 1111 to 1117. [37]
Claude Shannon (1916–2016), founder of information theory and modern cryptography, invented Minivac 601, and co-invented the first wearable computer (with Edward O. Thorp) Ugo Cerletti (1877–1963), together with Lucio Bini (1908–1964), Italy – Electroconvulsive therapy; Leona Chalmers (c. 1937), U.S. – modern menstrual cup
Tattoo inks are available in a range of colors that can be thinned or mixed together to produce other colors and shades. Most professional tattoo artists purchase inks pre-made (known as predispersed inks), while some artists mix their own using a dry pigment and a carrier.
[97] [131] Shen used the soot from the smoke of burned petroleum fuel (石油 Shíyóu, "rock oil" as Shen called it) to invent a new, more durable type of writing ink; the Ming dynasty pharmacologist Li Shizhen (1518–1593) wrote that Shen's ink was "lustrous like lacquer, and superior to that made from pinewood lamp-black," or the soot from ...