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Thomas Jefferson was an American politician and statesman, the third President of the United States (March 4, 1801 - March 4, 1809).
Jefferson was the son of a planter and received a law degree. In 1774, he wrote A Summary of the Rights of British America, which attracted public attention, and he soon gained a reputation as one of the first advocates of American independence from the authority of the British Parliament. In the spring of 1775, the Virginia legislature appointed him a delegate to the Second Conference of the Continental Congress. A year later he was appointed to a committee of five, which also included Adams and Benjamin Franklin, to draft a formal statement of reasons to justify a break with Great Britain. Jefferson thus became one of the authors of the Declaration of Independence. Jefferson succeeded Benjamin Franklin as minister to France in 1785, was secretary of state (1790-1793) under Washington, and vice president (1797-1801) under John Adams.
A Democratic-Republican, Jefferson, who believed that the national government should play a limited role in the lives of citizens, was elected president in 1800. One of the most significant accomplishments of Jefferson's first administration was the purchase of the Louisiana Territory from France for $15 million dollars in 1803 (from the Gulf of Mexico to present-day Canada), effectively doubling the size of the United States. During his second term, Jefferson was focused on trying to keep America out of the Napoleonic Wars in Europe. After his second term as president, he was succeeded by James Madison in 1808.
Upon leaving office, Jefferson retired to his plantation in Virginia, pursued his favorite pastimes, and helped found the University of Virginia. In addition to politics, he is known as a writer, farmer, horticulturist, inventor, book collector, art historian, architect, and scientist. He died at the age of 83 on July 4, 1826, the 50th anniversary of the Declaration of Independence.
Johannes Gensfleisch zur Laden zum Gutenberg was a German inventor and craftsman who introduced letterpress printing to Europe with his movable-type printing press. Though not the first of its kind, earlier designs were restricted to East Asia, and Gutenberg's version was the first to spread across the world. His work led to an information revolution and the unprecedented mass-spread of literature throughout Europe. It also had a direct impact on the development of the Renaissance, Reformation and humanist movement.
His many contributions to printing include the invention of a process for mass-producing movable type; the use of oil-based ink for printing books; adjustable molds; mechanical movable type; and the use of a wooden printing press similar to the agricultural screw presses of the period. Gutenberg's method for making type is traditionally considered to have included a type metal alloy and a hand mould for casting type. The alloy was a mixture of lead, tin, and antimony that melted at a relatively low temperature for faster and more economical casting, cast well, and created a durable type. His major work, the Gutenberg Bible, was the first printed version of the Bible and has been acclaimed for its high aesthetic and technical quality.
