fire extinguisher was patented by Alanson Crane. 1865:
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:
the first woman to earn a degree in electrical engineering at MIT, was born. 1902: Nobel
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.
| Feb | Mar |
Apr | May |
Jun | Jul |
Aug | Sep |
Oct | Nov |
historical tidbits have been collected from various sources, mostly on the Internet.
As detailed in
this article, 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. Many 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. Images used in the logos are often from open source websites
like Wikipedia, and are specifically credited with a hyperlink back to the source where
possible. Fair Use
laws permit small samples of copyrighted content.