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Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in
there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative
sources. On RF Cafe,
events with hyperlinks
have been verified.
significant historical events and
dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death
date ;-) A couple years ago, I began commemorating the birthdays of notable people and events with
special RF Cafe logos
. Where available, I like to use images
from postage stamps from the country where the person or event occurred.
1863: The fire extinguisher was patented by Alanson Crane. 1865: Heinrich Lenz, Russian physicist who framed Lenz's Law to describe the direction of flow of electric current generated by a wire moving through a magnetic field, died. 1868: Scottish physicist Sir David Brewster, who developed Brewster's Law, which relates the refractive index of a material to its polarizing angle, died. 1879: The electric arc light was used for the first time. 1883: Edith Clarke, the first woman to earn a degree in electrical engineering at MIT, was born. 1902: Nobel Prize winner Walter Brattain, co-inventor of the transistor, was born. 1923: Wilhelm Röntgen, discoverer of x-rays, died. 1933: The singing telegram was introduced by the Postal Telegraph Company of New York City. 1961: The Niagara Falls hydroelectric project began producing power amid a public ceremony. 1996: IBM's Deep Blue supercomputer defeated Garry Kasparov for the first time.