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In 1641, Samuel Winslow was granted the first patent in North America by the Massachusetts General Court for a new process for making salt. [ 1 ] [ 2 ] See also
Salt comes from two main sources: sea water, and the sodium chloride mineral halite (also known as rock salt). Rock salt occurs in vast beds of sedimentary evaporite minerals that result from the drying up of enclosed lakes, playas, and seas. Salt beds may be up to 350 metres (1,150 ft) thick and underlie broad areas.
In 1930, Mahatma Gandhi led a crowd of 100,000 protestors on the "Dandi March" or "Salt Satyagraha", during which they made their own salt from the sea as a demonstration of their opposition to the colonial salt tax. This act of civil disobedience inspired numerous Indians and transformed the Indian independence movement into a national ...
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13th century: Earliest documented snow goggles, a type of sunglasses, made of flattened walrus or caribou ivory are used by the Inuit peoples in the arctic regions of North America. [361] [362] In China, the first sunglasses consisting of flat panes of smoky quartz are documented. [363] [364] 13th century - 14th century: Worm gear cotton gin in ...
In 1641, the first patent in North America was issued to Samuel Winslow by the General Court of Massachusetts for a new method of making salt. [ 3 ] [ 4 ] [ 5 ] On April 10, 1790, President George Washington signed the Patent Act of 1790 (1 Stat. 109) into law proclaiming that patents were to be authorized for "any useful art, manufacture ...
Morton Salt is an American food company producing salt for food, water conditioning, industrial, agricultural, and road/highway use. Based in Chicago, [1] the business is North America's leading producer and marketer of salt. It is a subsidiary of holding company Stone Canyon Industries Holdings, Inc.
It was refined from the ashes of broadleaved trees and produced primarily in the forested areas of Europe, Russia, and North America. Although methods for producing artificial alkalis were invented in the late 18th century, these did not become economical until the late 19th century and so the dependence on organic sources of potash remained.