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Adolf Froelich
Adolf Froelich (December 24, 1887 – November 1943) was a Polish inventor, dentist and participant in the Polish-Soviet War. Curriculum vitae Adolf Froelich was born in Łaziska, Opole Lubelskie County, Poland, to parents Reinhold Froelich and Antonina Wilhelmina Józefina Froelich (née Majewska). He studied brewing technology at the scientific department Weihenstephan of the Technical University of Munich in Freising. Furthermore, he studied dentistry. He got his dentist approbation in 1918. As a dentist he worked inter alia in Jędrzejów. In 1932 he invented the double propeller. He was officer (rank: lieutenant) of the Polish Armed Forces. As a dentist he took part in the Polish-Soviet War being a member of the 9th Infantry Division. He died in Warsaw Warsaw ( pl, Warszawa, ), officially the Capital City of Warsaw,, abbreviation: ''m.st. Warszawa'' is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Pola ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Propeller
A propeller (colloquially often called a screw if on a ship or an airscrew if on an aircraft) is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral which, when rotated, exerts linear thrust upon a working fluid such as water or air. Propellers are used to pump fluid through a pipe or duct, or to create thrust to propel a boat through water or an aircraft through air. The blades are specially shaped so that their rotational motion through the fluid causes a pressure difference between the two surfaces of the blade by Bernoulli's principle which exerts force on the fluid. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft (ship), propeller shaft with an approximately horizontal axis. History Early developments The principle employed in using a screw propeller is derived from sculling. In sculling, a single blade is moved through an arc, from side to side taking care to keep presenting the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1943 Deaths
Events Below, the events of World War II have the "WWII" prefix. January * January 1 – WWII: The Soviet Union announces that 22 German divisions have been encircled at Stalingrad, with 175,000 killed and 137,650 captured. * January 4 – WWII: Greek-Polish athlete and saboteur Jerzy Iwanow-Szajnowicz is executed by the Germans at Kaisariani. * January 11 ** The United States and United Kingdom revise previously unequal treaty relationships with the Republic of China (1912–1949), Republic of China. ** Italian-American anarchist Carlo Tresca is assassinated in New York City. * January 13 – Anti-Nazi protests in Sofia result in 200 arrests and 36 executions. * January 14 – January 24, 24 – WWII: Casablanca Conference: Franklin D. Roosevelt, President of the United States; Winston Churchill, Prime Minister of the United Kingdom; and Generals Charles de Gaulle and Henri Giraud of the Free French forces meet secretly at the Anfa Hotel in Casablanca, Morocco, to plan the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
1887 Births
Events January–March * January 11 – Louis Pasteur's anti-rabies treatment is defended in the Académie Nationale de Médecine, by Dr. Joseph Grancher. * January 20 ** The United States Senate allows the Navy to lease Pearl Harbor as a naval base. ** British emigrant ship ''Kapunda'' sinks after a collision off the coast of Brazil, killing 303 with only 16 survivors. * January 21 ** The Amateur Athletic Union (AAU) is formed in the United States. ** Brisbane receives a one-day rainfall of (a record for any Australian capital city). * January 24 – Battle of Dogali: Abyssinian troops defeat the Italians. * January 28 ** In a snowstorm at Fort Keogh, Montana, the largest snowflakes on record are reported. They are wide and thick. ** Construction work begins on the foundations of the Eiffel Tower in Paris, France. * February 2 – The first Groundhog Day is observed in Punxsutawney, Pennsylvania. * February 4 – The Interstate Commerce Act ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warsaw
Warsaw ( pl, Warszawa, ), officially the Capital City of Warsaw,, abbreviation: ''m.st. Warszawa'' is the capital and largest city of Poland. The metropolis stands on the River Vistula in east-central Poland, and its population is officially estimated at 1.86 million residents within a greater metropolitan area of 3.1 million residents, which makes Warsaw the 7th most-populous city in the European Union. The city area measures and comprises 18 districts, while the metropolitan area covers . Warsaw is an Alpha global city, a major cultural, political and economic hub, and the country's seat of government. Warsaw traces its origins to a small fishing town in Masovia. The city rose to prominence in the late 16th century, when Sigismund III decided to move the Polish capital and his royal court from Kraków. Warsaw served as the de facto capital of the Polish–Lithuanian Commonwealth until 1795, and subsequently as the seat of Napoleon's Duchy of Warsaw. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
9th Infantry Division (Poland) (interwar)
The 9th Infantry Division ( pl, 9 Dywizja Piechoty) was a unit of the Polish Army in the Second Polish Republic. For most of 1919, the 9th Division's regiments were dispersed across the regions of Podlachia, Polesie and Volhynia, with one battalion sent to Dąbrowa Basin. Formation The division was originally formed in 1919. Stationed in Siedlce. The 9th Division's history begins in the early summer of 1919. It was formed on June 12 of that year, in Polesia, out of units of Operational Group Polesie, commanded by General Antoni Listowski. At that time, it was divided into two Infantry Brigades and one Artillery Brigade: * 17th Infantry Brigade ( 15th and 22nd Infantry Regiments), * 18th Infantry Brigade (34th and 35th Infantry Regiments), * 9th Artillery Brigade (9th Field Artillery Regiment, 9th Heavy Artillery Regiment). Polish and German conflict On February 5, 1919, the division attacked the German-occupied Brest Fortress. After four days, the Germans decided to ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polish Armed Forces
The Armed Forces of the Republic of Poland ( pl, Siły Zbrojne Rzeczypospolitej Polskiej, abbreviated ''SZ RP''; popularly called ''Wojsko Polskie'' in Poland, abbreviated ''WP''—roughly, the "Polish Military") are the national armed forces of the Republic of Poland. The name has been used since the early 19th century, but can also be applied to earlier periods. The Armed Forces of the Republic of Poland are the Wojska Lądowe ( Polish Land Forces), Marynarka Wojenna ( Polish Navy), Siły Powietrzne ( Polish Air Forces), Wojska Specjalne (Polish Special Forces) and Wojska Obrony Terytorialnej ( Polish Territorial Defence Force) which are under the command of the Ministerstwo Obrony Narodowej Rzeczypospolitej Polskiej ( Ministry of National Defence of Poland). In 2022, Poland ranked 20th in the world in terms of military expenditures and was among the nine NATO member states that have maintained their military spending above the required 2% of annual GDP. In accordance with t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Inventor
An invention is a unique or novel device, method, composition, idea or process. An invention may be an improvement upon a machine, product, or process for increasing efficiency or lowering cost. It may also be an entirely new concept. If an idea is unique enough either as a stand alone invention or as a significant improvement over the work of others, it can be patented. A patent, if granted, gives the inventor a proprietary interest in the patent over a specific period of time, which can be licensed for financial gain. An inventor creates or discovers an invention. The word ''inventor'' comes from the Latin verb ''invenire'', ''invent-'', to find. Although inventing is closely associated with science and engineering, inventors are not necessarily engineers or scientists. Due to advances in artificial intelligence, the term "inventor" no longer exclusively applies to an occupation (see human computers). Some inventions can be patented. The system of patents was established ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dentistry
Dentistry, also known as dental medicine and oral medicine, is the branch of medicine focused on the teeth, gums, and mouth. It consists of the study, diagnosis, prevention, management, and treatment of diseases, disorders, and conditions of the mouth, most commonly focused on dentition (the development and arrangement of teeth) as well as the oral mucosa. Dentistry may also encompass other aspects of the craniofacial complex including the temporomandibular joint. The practitioner is called a dentist. The history of dentistry is almost as ancient as the history of humanity and civilization with the earliest evidence dating from 7000 BC to 5500 BC. Dentistry is thought to have been the first specialization in medicine which have gone on to develop its own accredited degree with its own specializations. Dentistry is often also understood to subsume the now largely defunct medical specialty of stomatology (the study of the mouth and its disorders and diseases) for which reas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freising
Freising () is a university town in Bavaria, Germany, and the capital of the Freising ''Landkreis'' (district), with a population of about 50,000. Location Freising is the oldest town between Regensburg and Bolzano, and is located on the Isar river in Upper Bavaria, north of Munich and near the Munich International Airport. The city is built on and around two prominent hills: the Cathedral Hill with the former Bishop's Residence and Freising Cathedral, and Weihenstephan Hill with the former Weihenstephan Abbey, containing the oldest working brewery in the world. It was also the location of the first recorded tornado in Europe. The city is 448 meters above sea level. Cultural significance Freising is one of the oldest settlements in Bavaria, becoming a major religious centre in the early Middle Ages. It is the centre of an important diocese. Some important historical documents were created between 900 and 1200 in its monastery: * Freising manuscripts written in Slovenian, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
