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🔗 Military history 🔗 Military history/Maritime warfare 🔗 Ships

A midget submarine (also called a mini submarine) is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to 6 or 9, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.

Both military and civilian midget submarines have been built. Military types work with surface ships and other submarines as mother ships. Civilian and non-combatant military types are generally called submersibles and normally work with surface ships.

Most early submarines would now be considered midget submarines, such as the United States Navy's USS Holland (SS-1) and the British Royal Navy's HMS Holland 1.

🔗 United States 🔗 Books 🔗 Civil Rights Movement

The Negro Motorist Green Book (also The Negro Motorist Green-Book, The Negro Travelers' Green Book, or simply the Green Book) was an annual guidebook for African-American roadtrippers. It was originated and published by African American, New York City mailman Victor Hugo Green from 1936 to 1966, during the era of Jim Crow laws, when open and often legally prescribed discrimination against African Americans especially and other non-whites was widespread. Although pervasive racial discrimination and poverty limited black car ownership, the emerging African-American middle class bought automobiles as soon as they could, but faced a variety of dangers and inconveniences along the road, from refusal of food and lodging to arbitrary arrest. In response, Green wrote his guide to services and places relatively friendly to African-Americans, eventually expanding its coverage from the New York area to much of North America, as well as founding a travel agency.

Many black Americans took to driving, in part to avoid segregation on public transportation. As the writer George Schuyler put it in 1930, "all Negroes who can do so purchase an automobile as soon as possible in order to be free of discomfort, discrimination, segregation and insult." Black Americans employed as athletes, entertainers, and salesmen also traveled frequently for work purposes.

African-American travelers faced hardships such as white-owned businesses refusing to serve them or repair their vehicles, being refused accommodation or food by white-owned hotels, and threats of physical violence and forcible expulsion from whites-only "sundown towns". Green founded and published the Green Book to avoid such problems, compiling resources "to give the Negro traveler information that will keep him from running into difficulties, embarrassments and to make his trip more enjoyable." The maker of a 2019 documentary film about the book offered this summary: "Everyone I was interviewing talked about the community that the Green Book created: a kind of parallel universe that was created by the book and this kind of secret road map that the Green Book outlined".

From a New York-focused first edition published in 1936, Green expanded the work to cover much of North America, including most of the United States and parts of Canada, Mexico, the Caribbean, and Bermuda. The Green Book became "the bible of black travel during Jim Crow", enabling black travelers to find lodgings, businesses, and gas stations that would serve them along the road. It was little known outside the African-American community. Shortly after passage of the Civil Rights Act of 1964, which outlawed the types of racial discrimination that had made the Green Book necessary, publication ceased and it fell into obscurity. There has been a revived interest in it in the early 21st century in connection with studies of black travel during the Jim Crow era.

Four issues (1940, 1947, 1954, and 1963) have been republished in facsimile (as of December 2017), and have sold well. Twenty-three additional issues have now been digitized by the New York Public Library Digital Collections.

🔗 Germany 🔗 Disaster management 🔗 Politics 🔗 European history 🔗 Crime and Criminal Biography 🔗 Firefighting

The Reichstag fire (German: Reichstagsbrand, pronounced [ˈʁaɪçstaːksˌbʁant] ) was an arson attack on the Reichstag building, home of the German parliament in Berlin, on Monday, 27 February 1933, precisely four weeks after Adolf Hitler was sworn in as Chancellor of Germany. Marinus van der Lubbe, a Dutch council communist, was said to be the culprit; the Nazis attributed the fire to a group of Communist agitators, used it as a pretext to claim that Communists were plotting against the German government, and induced President Paul von Hindenburg to issue the Reichstag Fire Decree, suspending civil liberties, and pursue a "ruthless confrontation" with the Communists. This made the fire pivotal in the establishment of Nazi rule in Germany.

The first report of the fire came shortly after 9:00 p.m., when a Berlin fire station received an alarm call. By the time police and firefighters arrived, the structure was engulfed in flames. The police conducted a thorough search inside the building and found Van der Lubbe, who was arrested.

After the Fire Decree was issued, the police – now controlled by Hitler's Nazi Party – made mass arrests of communists, including all of the communist Reichstag delegates. This severely crippled communist participation in the 5 March elections. After the 5 March elections, the absence of the communists allowed the Nazi Party to expand their plurality in the Reichstag, greatly assisting the Nazi seizure of total power. On 9 March 1933 the Prussian state police arrested Bulgarians Georgi Dimitrov, Vasil Tanev, and Blagoy Popov, who were known Comintern operatives (though the police did not know it then, Dimitrov was head of all Comintern operations in Western Europe). Ernst Torgler, chairman of the KPD Reichstag faction, had surrendered to police on 28 February.

Van der Lubbe and the four communists were the defendants in a trial that started in September 1933. It ended in the acquittal of the four communists and the conviction of Van der Lubbe, who was then executed. In 2008, Germany posthumously pardoned Van der Lubbe under a law introduced in 1998 to lift unjust verdicts from the Nazi era. The responsibility for the Reichstag fire remains a topic of debate, as while Van der Lubbe was found guilty, it is unclear whether he acted alone. The consensus amongst historians is the Reichstag was set ablaze by Van der Lubbe; some consider it to have been a part of a Nazi plot, a view Richard J. Evans labels a conspiracy theory.

🔗 Horticulture and Gardening 🔗 Occupations

Garden hermits or ornamental hermits were hermits encouraged to live in purpose-built hermitages, follies, grottoes, or rockeries on the estates of wealthy landowners, primarily during the 18th century. Such hermits would be encouraged to dress like druids and remain permanently on site, where they could be fed, cared for, and consulted for advice, or viewed for entertainment.

🔗 Internet 🔗 Software 🔗 Software/Computing 🔗 Maps

Yahoo! Pipes was a web application from Yahoo! that provided a graphical user interface for building data mashups that aggregate web feeds, web pages, and other services, creating Web-based apps from various sources, and publishing those apps. The application worked by enabling users to "pipe" information from different sources and then set up rules for how that content should be modified (for example, filtering). Other than the pipe editing page, the website had a documentation page and a discussion page. The documentation page contained information about pipes including guides for the pipe editor and troubleshooting. The discussion page enabled users to discuss the pipes with other users.

🔗 Cryptography 🔗 Cryptography/Computer science

Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. A message is concealed in the presentation of text, rather than its content. Bacon cipher is categorized as both a substitution cipher (in plain code) and a concealment cipher (using the two typefaces).

🔗 Chemicals

Solanine is a glycoalkaloid poison found in species of the nightshade family within the genus Solanum, such as the potato (Solanum tuberosum), the tomato (Solanum lycopersicum), and the eggplant (Solanum melongena). It can occur naturally in any part of the plant, including the leaves, fruit, and tubers. Solanine has pesticidal properties, and it is one of the plant's natural defenses. Solanine was first isolated in 1820 from the berries of the European black nightshade (Solanum nigrum), after which it was named. It belongs to the chemical family of saponins.

🔗 Medicine 🔗 Ancient Egypt

The Ebers Papyrus, also known as Papyrus Ebers, is an Egyptian medical papyrus of herbal knowledge dating to circa 1550 BC. Among the oldest and most important medical papyri of ancient Egypt, it was purchased at Luxor in the winter of 1873–74 by Georg Ebers. It is currently kept at the library of the University of Leipzig, in Germany.

🔗 France 🔗 Celts 🔗 Mythology

Ys (pronounced EESS), also spelled Is or Kêr-Is in Breton, and Ville d'Ys in French, is a mythical city on the coast of Brittany that was swallowed up by the ocean. Most versions of the legend place the city in the Baie de Douarnenez.