zJs=10 zJs=11 zJs=12 zJs=13 zc(5,'jsc',zJs,9999999,'') About Homework Help Inventors Home ... Industrial Revolution zau(256,152,145,'gob','http://z.about.com/5/ad/go.htm?gs='+gs,''); Famous Inventions Famous Inventors Black Inventors Women Inventors ... Help zau(256,138,125,'el','http://z.about.com/0/ip/417/0.htm','');w(xb+xb); Stay Current Subscribe to the About Inventors newsletter. Search Inventors From Mary Bellis Your Guide to Inventors Sign up for my Newsletter The History of Timekeeping Learn about the history of ancient timekeeping, sun and water clocks, mechanical and quartz clocks, time standards and time zones. For example: In 1577, Jost Burgi invented the minute hand. Burgi's invention was part of a clock made for Tycho Brahe, an astronomer who needed an accurate clock for his stargazing. Tuesday June 01, 2004 Aerosol Spray Cans On November 23, 1927, Norwegian engineer Erik Rotheim patented the first aerosol can and valve that could hold and dispense products and propellant systems. Monday May 31, 2004 Louis Pasteur Louis Pasteur discovered that most infectious diseases are caused by germs, known as the "germ theory of disease". Pasteur created inventions based on fermentation, such as improved brewing methods and pasteurization. Sunday May 30, 2004 | |
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