(Wcsa.world) Alexander Simon Wolcott (also Alexander S. Wolcott and A. S. Wolcott; June 14, 1804 – March 26, 1844) was a maker of medical supplies.
WCSA - On This Day - May 07, 2021- Russian scientist Alexander Stepanovich Popov demonstrates his invention - the world's first radio receiver, in 1895
(Wcsa.world) Alexander Stepanovich Popov was a Russian physicist who is acclaimed in his homeland and some eastern European countries as the inventor of radio.
(Wcsa.world) Refrigeration is the process of creating cooling conditions by removing heat. It is mostly used to preserve food and other perishable items, preventing foodborne illnesses. It works because bacteria growth is slowed at lower temperatures.
WCSA - On This Day - May 05, 2021 - Mary Kies is 1st woman issued a US patent for weaving straw, in 1809
(wcsa.wold) Mary Kies was an early 19th-century American who received the first patent granted to a woman by the United States Patent and Trademark Office, on May 5, 1809.
WCSA - On This Day - May 04, 2021 - Thomas Fitch Rowland of Greenpoint, New York, patented a “submarine drilling apparatus”, in 1869
(Wcsa.world) The exploration history of the U.S. offshore oil and natural gas industry began in the Pacific Ocean at the end of the 19th century. As recently as 1947 no company had ever risked drilling beyond the sight of land.
(Wcsa.world) John G. Kemeny (left) and Thomas E. Kurtz made a truly Basic contribution to computer science in 1964.
[WorldKings – World Almanac Event 2021] 110th anniversary of establishment of Tsinghua University, China (April 29, 1911 – April 29, 2021)
(Worldkings.org) Tsinghua University (THU) is a multidisciplinary university in Beijing, China. This school is considered the most prestigious university in China and is always ranked one of the best universities in Higher Education Asia Rankings.
WCSA - On This Day - April 29, 2021 - Scottish engineer James Watt's patent for a steam engine with a separate condenser enrolled (Patent 913), in 1769
(Worldkings.org) The Watt steam engine (alternatively known as the Boulton and Watt steam engine) was the first type of steam engine to make use of a separate condenser.
[WorldKings – World Almanac Event 2021] - 26th anniversary of establishment of China Telecommunications Corporation (April 27, 1995 - April 27,2021)
(Worldkings.org) China Telecommunications Corporation known as its trading name China Telecom is a chinese state-owned telecommunication company. It is the largest fixed-line service and the third largest mobile telecommunication provider in China.
(Wcsa.world) A computer mouse is a hand-held pointing device that detects two-dimensional motion relative to a surface. This motion is typically translated into the motion of a pointer on a display, which allows a smooth control of the graphical user interface.