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Richard Witt's book Arithmeticall Questions, published in 1613, was a landmark in the history of compound interest. It was wholly devoted to the subject (previously called anatocism), whereas previous writers had usually treated compound interest briefly in just one chapter in a mathematical textbook. Witt's book gave tables based on 10% (the ...
The definition of compound interest. In simple terms, the compound interest definition is the interest you earn on interest. With a savings account, money market account or CD that earns compound ...
For loans, simple interest is based on only the principal amount, whereas compound interest is based on the principal and interest combined. A savings account grows more quickly by earning ...
Campani compound microscope. The Campani compound microscope is a microscope on exhibit at the Museo Galileo in Italy, thought to have been built by optical instrument maker Giuseppe Campani in the second half 17th century. For a time it was thought to have been built by Italian scientist Galileo Galilei but no longer bares that attribution.
Antonie van Leeuwenhoek (1632–1723). The field of microscopy (optical microscopy) dates back to at least the 17th-century.Earlier microscopes, single lens magnifying glasses with limited magnification, date at least as far back as the wide spread use of lenses in eyeglasses in the 13th century [2] but more advanced compound microscopes first appeared in Europe around 1620 [3] [4] The ...
The value of a paper savings bond can be checked by using the savings bond calculator on the TreasuryDirect website and entering this information found on bond: Issue date. Bond series ...
1936: Erwin Wilhelm Müller invents the field emission microscope. 1938: James Hillier builds another TEM. 1951: Erwin Wilhelm Müller invents the field ion microscope and is the first to see atoms. 1953: Frits Zernike, professor of theoretical physics, receives the Nobel Prize in Physics for his invention of the phase-contrast microscope.
Giovanni Faber. Lincean, naming the microscope. Giovanni Faber (or Johann Faber, sometimes also known as Fabri or Fabro; 1574–1629) was a German papal doctor, botanist and art collector, originally from Bamberg in Bavaria, who lived in Rome from 1598. He was curator of the Vatican botanical garden, a member and the secretary of the Accademia ...