His amazing, unprecedented collection of animals, plants and insects from all around the world gained international fame during his lifetime. In 1731, after decades of collecting, Seba commissioned illustrations of each and every specimen and arranged the publication of a four-volume catalog detailing his entire collection?from strange and exotic plants to snakes, frogs, crocodiles, shellfish, corals, insects, butterflies and more, as well as fantastic beasts, such as a hydra and a dragon. Seba's scenic illustrations, often mixing plants and animals in a single plate, were unusual even for the time. Many of the stranger and more peculiar creatures from Seba's collection, some of which are now extinct, were as curious to those in Seba's day as they are to us now. This reproduction is taken from a rare, hand-colored original. The introduction offers background information about the fascinating tradition of the cabinet of curiosities to which Seba's curiosities belonged.

    This edition of Euler's classic, published in 1822, is an English translation which includes notes added by Euler's tutor, Johann Bernoulli, and additions by Joseph-Louis Lagrange, both giants in eighteenth-century mathematics, as well as a short biography of Euler. Part 1 begins with elementary mathematics of determinate quantities and includes four sections on simple calculations (adding, subtracting, division, multiplication), and then progresses to compound calculations (fractions), ratios and proportions and algebraic equations. Part 2 consists of 15 chapters on analyses of indeterminate quantities. Here, Euler shows the reader several ways to solve polynomial equations up to the fourth degree. This landmark book showed students the beauty of mathematics, and more significantly, how to do it.