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What year was the periscope invented?

During World War I, some rifles had a periscope attached to allow soldiers to view the area outside the trench. Periscopes are also used in armored vehicles to allow the personnel in the vehicle to remain under cover while viewing the situation in the surrounding area. Rudolph Gundlach patented a rotary periscope for use in tanks in 1936.\nThe word periscope is derived from the Greek words, peri and scopus, meaning "around" and "to look."

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What did Prince Henry the Navigator discover?

One problem bedeviling sailors in the early years of exploration was the fact that ships designed before 1400 were too heavy and slow to make exploratory journeys. He led the effort to develop lighter, swifter ships capable of undertaking far longer journeys, and the result was the caravel.\nUltimately, the voyages that Henry sponsored when as far south along the Atlantic coast of Africa as Guinea and the town of Lagos. He also hired cartographers to map the coastline of Mauritania. One of the darker sides of Prince Henry's legacy is that he began to bring slaves back to Portugal under th..

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Why did Cleopatra marry her brother?

According to Dr. Thayes Watkins of San Jose State University, Cleopatra became queen when she married her oldest brother after the death of her father. Cleopatra then remarried after the death of her brother during battle. She was married to her youngest brother until his death, after which she became the sole ruler of Egypt.\nAccording to Saint Louis University, many believed that Cleopatra poisoned her younger brother to take the throne. She also bore the children of Julius Caesar and Marc Antony while she was married to her brothers.

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What is the Hupa Indian village's religion?

The Hupa Indians held these ritual ceremonies to honor their history and demonstrate activities of the supernaturals who were central to their belief system. Among their tribe were female curing shamans who charged very high fees to suck illness out of a sick tribe member's body. The male shamans or sorcerers were believed to have powers to harm others with their sorcery.

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When was the ancient Persian government established?

Prior to the sixth century B.C., Persian rulers were vassals of the Assyrian Empire. Cyrus the Great became king in 559 B.C. and united the Persians with the Medes, creating the Persian Achaemenid Empire. He expanded the empire by taking the ancient city of Babylon and conquering Syria, Assyria, Cappadocia, Lydia, Caria and Phoenicia. The Achaemenid Empire lasted until Alexander the Great’s conquest of Persia in 330 B.C.

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When was Lloyd P. Ray born?

Ray's dustpan received a patent on Aug. 3, 1897. Unlike the original types of dustpans, Ray's added on a handle that allowed a person to sweep trash into the pan without dirtying his hands. The handle addition was made out of wood, while the collection plate on the dustpan was metal. Ray's patent for his dustpan was only the 165th patent to be issued in the United States.

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Who invented the wheel?

The first wheels in ancient Sumer were used as potters' wheels to form ceramics, such as pots and jugs, before use in transportation. The wheel and most forms of circular motion aren't visible or present in nature. Wheels as transportation tools likely arose from the practice of rolling heavy objects long distances on logs and sledges. The wheel gave its inventors definitive advantages in trade, pottery production, transportation and warfare.

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How did Hitler take advantage of the Great Depression?

During the period of German prosperity before the depression, the Nazi Party was minuscule, though tightly controlled and well disciplined. The depression fractured the German economy and government. Failing in his attempt to invoke emergency powers, Chancellor Heinrich Bruening asked President Hindenburg to dissolve the Reichstag and call for new elections. The Nazis took the opportunity to launch an aggressive, meticulously orchestrated campaign all over Germany. The Nazi Party received over 6,000,000 votes, or 18 percent of the total, and won 107 seats in the Reichstag, making it the second..

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Why did Elie Wiesel title his book "Night"?

In an initial respect, the metaphor of night marks the end of young Elie's normal life, when he and his family are violently uprooted from their homes and community and sent to the concentration camp at Birkenau. During his first weeks there, Wiesel experiences the total loss of all his female family members. He also witnesses, along with his father, the fiery death of a truckload of children. In essence, night represents the descending darkness of a complete absence of humanity and compassion, as well as of the lunatic, comprehension-defying, physical articulation of Hitler's plan f..

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Why do people go to war?

In the ancient Middle East, the people went to war because they wanted to better their way of life by getting more water, more resources and better farmland. The people that the Middle East people attacked defended themselves because they wanted to protect their way of life.Another example can be seen during the Persian Wars between Greece and the Persian Empire. The Persian people wanted more land, food and resources. They also believed that the Greek shipping trade in the Aegean Sea and the Mediterranean Sea was creating problems for their Persian shipping trade. The Persians went to war wit..

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