William Oughtred was a prominent mathematician and educator in the seventeenth century, known for his significant contributions to mathematics and teaching methods. His work emphasized the importance of mathematical principles and their applications, making complex concepts accessible to students. Oughtred is best known for his invention of the slide rule, which revolutionized calculations and became an essential tool for engineers and scientists. His pedagogical approach combined clarity ...

"On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century" by Florian Cajori is a detailed exploration of the development and significance of Gunter's scale and the slide rule in the context of 17th-century mathematics and engineering. Cajori meticulously examines the historical background, the mathematical principles involved, and the practical applications of these tools. His work highlights how these instruments revolutionized calculations and measurements, pav...

William Oughtred: A Great Seventeenth-Century Teacher of Mathematics is a comprehensive exploration of the life, work, and enduring influence of William Oughtred, one of the most significant mathematicians and educators of the seventeenth century. Authored by Florian Cajori, this detailed biography delves into Oughtred’s remarkable contributions to mathematics, particularly his innovations in mathematical notation and his invention of the slide rule, a tool that revolutionized calculation ...

On the History of Gunter's Scale and the Slide Rule During the Seventeenth Century is a comprehensive historical treatise that delves into the origins, development, and significance of two of the most important mathematical instruments of the early modern period: Gunter’s scale and the slide rule. Authored by Florian Cajori, a renowned historian of mathematics, the book meticulously traces the evolution of these calculating devices from their inception in the early 1600s through their wide...

This book treats of the evolution of the US dollar mark, the history and curiosities of American coinage.The United States dollar, adopted in 1785, was avowedly modelled on the average weight of the Spanish dollar coins in circulation. Thomas Jefferson speaks of the dollar as "a known coin, and the most familiar of all to the minds of the people." No United States dollars were actually coined before the year 1794. We proceed to unfold our data and to show the evolution of the dolla...

This classic study notes the first appearance of a mathematical symbol and its origin, the competition it encountered, its spread among writers in different countries, its rise to popularity, its eventual decline or ultimate survival. The author's coverage of obsolete notations — and what we can learn from them — is as comprehensive as those which have survived and still enjoy favor. Originally published in 1929 in a two-volume edition, this monumental work is presented here in one volume....