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The middle years of the nineteenth century saw two crucial develop ments in the history of modern logic: George Boole's algebraic treat ment of logic and Augustus De Morgan's formulation of the logic of relations. The former episode has been studied extensively; the latter, hardly at all. This is a pity, for the most central feature of modern logic may well be its ability to handle relational inferences. De Morgan was the first person to work out an extensive logic of relations, and the purpose of this book is to study this attempt in detail. Augustus De Morgan (1806-1871) was a British mathematician and logician who was Professor of Mathematics at the University of London (now, University College) from 1828 to 1866. A prolific but not highly original mathematician, De Morgan devoted much of his energies to the rather different field of logic. In his Formal Logic (1847) and a series of papers "On the Syllogism" (1846-1862), he attempted with great ingenuity to reformulate and extend the tradi tional syllogism and to systematize modes of reasoning that lie outside its boundaries. Chief among these is the logic of relations. De Mor gan's interest in relations culminated in his important memoir, "On the Syllogism: IV and on the Logic of Relations," read in 1860."
The middle years of the nineteenth century saw two crucial develop ments in the history of modern logic: George Boole's algebraic treat ment of logic and Augustus De Morgan's formulation of the logic of relations. The former episode has been studied extensively; the latter, hardly at all. This is a pity, for the most central feature of modern logic may well be its ability to handle relational inferences. De Morgan was the first person to work out an extensive logic of relations, and the purpose of this book is to study this attempt in detail. Augustus De Morgan (1806-1871) was a British mathematician and logician who was Professor of Mathematics at the University of London (now, University College) from 1828 to 1866. A prolific but not highly original mathematician, De Morgan devoted much of his energies to the rather different field of logic. In his Formal Logic (1847) and a series of papers "On the Syllogism" (1846-1862), he attempted with great ingenuity to reformulate and extend the tradi tional syllogism and to systematize modes of reasoning that lie outside its boundaries. Chief among these is the logic of relations. De Mor gan's interest in relations culminated in his important memoir, "On the Syllogism: IV and on the Logic of Relations," read in 1860."
In the late 1850s many of the most striking places in Wyoming, Idaho, and Montana had not yet been surveyed by any government expedition. This book brings to life the expedition that first explored these regions. As the last major government survey of the American West before the Civil War, the Raynolds Expedition began in 1859. This highly readable daily journal of Captain William F. Raynolds, previously unpublished, covers the most challenging period of that expedition, from May 7 to July 4, 1860. It describes what the Raynolds party did and saw while traveling from its winter quarters near today's Glenrock, Wyoming, up to the head of the Wind River, through Jackson Hole, and on to the Three Forks of the Missouri in southwestern Montana. The party included legendary mountain man Jim Bridger, geologist Ferdinand Hayden, and artists Anton SchOEnborn and James Hutton, among the first to depict the Teton Range. Historians, travelers, and outdoor enthusiasts will welcome this important addition to the literature of western exploration.
In the late 1850s many of the most striking places in Wyoming, Idaho, and Montana had not yet been surveyed by any government expedition. This book brings to life the expedition that first explored these regions. As the last major government survey of the American West before the Civil War, the Raynolds Expedition began in 1859. This highly readable daily journal of Captain William F. Raynolds, previously unpublished, covers the most challenging period of that expedition, from May 7 to July 4, 1860. It describes what the Raynolds party did and saw while traveling from its winter quarters near today's Glenrock, Wyoming, up to the head of the Wind River, through Jackson Hole, and on to the Three Forks of the Missouri in southwestern Montana. The party included legendary mountain man Jim Bridger, geologist Ferdinand Hayden, and artists Anton Schoenborn and James Hutton, among the first to depict the Teton Range.Historians, travelers, and outdoor enthusiasts will welcome this important addition to the literature of western exploration.
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