Yourth today

The electric light Another offshoot of the carbon experiments reached fruition sooner. Samuel Langley, Henry Draper, and other American scientists needed a highly sensitive instrument that could be used to measure minute temperature changes in heat emitted from the Sun’s corona during a solar eclipse along the Rocky Mountains on July 29, 1878. To satisfy those needs Edison devised a “microtasimeter” employing a carbon button. This was a time when great advances were being made in electric arc lighting, and during the expedition, which Edison accompanied, the men discussed the practicality of “subdividing” the intense arc lights so that electricity could be used for lighting in the same fashion as with small, individual gas “burners.” The basic problem seemed to be to keep the burner, or bulb, from being consumed by preventing it from overheating. Edison thought he would be able to solve this by fashioning a microtasimeter-like device to control the current. He boldly announced that he would invent a safe, mild, and inexpensive electric light that would replace the gaslight.
George Washington.
George Washington (February 22, 1732 – December 14, 1799) was an American political leader, military general, statesman, and Founding Father who served as the first president of the United States from 1789 to 1797. Previously, he led Patriot forces to victory in the nation's War for Independence. He presided at the Constitutional Convention of 1787, which established the U.S. Constitution and a federal government. Washington has been called the "Father of His Country" for his manifold leadership in the formative days of the new nation.
Washington's first public office was serving as official Surveyor of Culpeper County, Virginia from 1749 to 1750. Subsequently, he received his initial military training and a command with the Virginia Regiment during the French and Indian War. He was later elected to the Virginia House of Burgesses and was named a delegate to the Continental Congress, where he was appointed Commanding General of the Continental Army. He commanded American forces, allied with France, in the defeat and surrender of the British during the Siege of Yorktown. He resigned his commission after the Treaty of Paris in 1783.
Washington played a key role in adopting and ratifying the Constitution and was then twice elected president by the Electoral College. He implemented a strong, well-financed national government while remaining impartial in a fierce rivalry between cabinet members Thomas Jefferson and Alexander Hamilton. During the French Revolution, he proclaimed a policy of neutrality while sanctioning the Jay Treaty. He set enduring precedents for the office of president, including the title "Mr. President", and his Farewell Address is widely regarded as a pre-eminent statement on republicanism.
Washington owned slaves, and, in order to preserve national unity, he supported measures passed by Congress to protect slavery. He later became troubled with the institution of slavery and freed his slaves in a 1799 will. He endeavored to assimilate Native Americans into Anglo-American culture, but combated indigenous resistance during instances of violent conflict. He was a member of the Anglican Church and the Freemasons, and he urged broad religious freedom in his roles as general and president. Upon his death, he was eulogized as "first in war, first in peace, and first in the hearts of his countrymen". He has been memorialized by monuments, art, geographical locations including the national capital, stamps, and currency, and many scholars and polls rank him among the greatest U.S. presidents.