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Mark Pennell sits at the helm of his time machine.Mark's Almanac is a 90-second time travel that highlights the world's history from the very serious to the sometimes sublime.

Mark's Almanac for December 15, 2020

picture-of-mechanical-street-sweeper-by-joseph-whitworth.jpg
vacuumcleanerhistory.com
Picture of mechanical street sweeper by Joseph Whitworth. It entered service in Philadelphia on this date in 1854.

It was on this date in 1854 that the street sweeper was first in used in America in Philadelphia. And also on this date, Antonín Dvořák premiered his From the New World symphony in 1893.