New York: Macmillan, 1896.
Illustrated by Illustrated. First Edition; First Printing. Hardcover. Good with no dust jacket. Item #14490
Library stamps/marks/labels/pocket/slip, spine covered by neat tape repair, rear hinge taped, front hinge just starting, otherwise light wear. Errata sheet tipped in. Solid hardcover.; "In mathematics, the quaternion number system extends the complex numbers. Quaternions were first described by Irish mathematician William Rowan Hamilton in 1843 and applied to mechanics in three-dimensional space. Hamilton defined a quaternion as the quotient of two directed lines in a three-dimensional space, or, equivalently, as the quotient of two vectors. Multiplication of quaternions is noncommutative. [While largely replace by vector analysis ...] quaternions have had a revival since the late 20th century, primarily due to their utility in describing spatial rotations. The representations of rotations by quaternions are more compact and quicker to compute than the representations by matrices." - Wikipedia. Hathaway's late nineteenth-century Primer "is prepared for average students with a thorough knowledge of the elements of algebra and geometry, and is believed to be a simple and elementary treatment founded directly upon the fundamental ideas of the subject." - Preface. ; Ex-Library; x, 113, 8 ad pages.