Mary Schroeder was 3 years old when Abraham Lincoln is elected as the 16th President of United States. Abraham Lincoln was an American statesman and lawyer who served as the 16th President of the United States from March 1861 until his assassination in April 1865. Lincoln led the United States through the American Civil War—its bloodiest war and perhaps its greatest moral, constitutional, and political crisis. In doing so, he preserved the Union, abolished slavery, strengthened the federal government, and modernized the economy.
Mary Schroeder was 23 years old when Thomas Edison demonstrates incandescent lighting to the public for the first time, in Menlo Park, New Jersey. Thomas Alva Edison was an American inventor and businessman, who has been described as America's greatest inventor. He developed many devices that greatly influenced life around the world, including the phonograph, the motion picture camera, and the long-lasting, practical electric light bulb. Dubbed "The Wizard of Menlo Park", he was one of the first inventors to apply the principles of mass production and large-scale teamwork to the process of invention, and is often credited with the creation of the first industrial research laboratory.
Mary Schroeder was 24 years old when The world's first international telephone call is made between St. Stephen, New Brunswick, Canada, and Calais, Maine, United States. A telephone call is a connection over a telephone network between the called party and the calling party.
Mary Schroeder was 42 years old when Spanish–American War: The Treaty of Paris is signed, officially ending the conflict. The Spanish–American War was fought between the United States and Spain in 1898. Hostilities began in the aftermath of the internal explosion of the USS Maine in Havana Harbor in Cuba, leading to US intervention in the Cuban War of Independence. American acquisition of Spain's Pacific possessions led to its involvement in the Philippine Revolution and ultimately in the Philippine–American War.
Mary Schroeder was 48 years old when Albert Einstein publishes his first paper on the special theory of relativity. Albert Einstein was a German-born theoretical physicist who developed the theory of relativity, one of the two pillars of modern physics. His work is also known for its influence on the philosophy of science. He is best known to the general public for his mass–energy equivalence formula E = mc2, which has been dubbed "the world's most famous equation". He received the 1921 Nobel Prize in Physics "for his services to theoretical physics, and especially for his discovery of the law of the photoelectric effect", a pivotal step in the development of quantum theory.
Mary Schroeder died on 12 Jul 1911 at the age of 54