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Most watches today run at 4Hz (28,800vph), but in the 1960s a number of Swiss and Japanese watch manufacturers were searching for the limits of mechanical accuracy, and produced watches that ran at 5Hz (36,000vph, or the second hand moves 10 times per second). A slower number of oscillations from the balance spring can make the watch less accurate, but can extend the power reserve, while a faster rate of movement improves accuracy but eats into the period between the watch needing a wind. Most mechanical watches are regulated by a single balance spring that oscillates at a set rate (either measured in hertz, which can be converted to vibrations per hour), and the steady in and out breathing of this spring is what keeps the watch running on good time. Here’s how more than two months of power reserve is possible. One of these feats is the Vacheron Constantin Traditionnelle Twin Beat Perpetual Calendar, a watch that not only offers a complex calendar function, but also does it with a power reserve of 65 days. Amidst the clamour and drama of the GPHG, where the pitting of brands head to head can increase the blood pressure of some ardent watch enthusiasts, the focus can sometimes miss the truly impressive feats of technical engineering that are on display. It’s been a very busy week of watches in Geneva, with Only Watch 2019 setting new records, and the Grand Prix d’Horlogerie de Genève (GPHG) awarding prizes to some of the best watches of the year ( which included some upsets).
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Statistics in Plain English, Fourth Edition (Volume 1).George Eliot for the Twenty-First Century.Schaum's Outline of Engineering Mechanics Dynamics (Schaum's Outlines).
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Air Plants: The Curious World of Tillandsias.Pharaonic King-Lists, Annals and Day-Books.Mini Encyclopedia of Dog Training and Behaviour.Serving as a monumental preface to Aristotle's Poetics, this book allows readers to discern the emergence, within the manifold activities that might be called criticism, of the historically specific discourse on poetry that has shaped subsequent Western approaches to literature. through the rise of poetics in the late fourth, he asks when we first can recognize anything like the modern notions of literature as imaginative writing and of literary criticism as a special knowledge of such writing. Examining Greek discussions of poetry from the late sixth century B.C. With unprecedented and penetrating detail, Ford considers varying scholarly interpretations of the key texts discussed.
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The Origins of Criticism complements the usual, history-of-ideas approach to the topic precisely by treating criticism as a social as well as a theoretical activity. He pinpoints when and how, later in the Greek tradition than is usually assumed, poetry was studied as a discipline with its own principles and methods. Andrew Ford offers a new understanding of the development of criticism, demonstrating that its roots stretch back long before the sophists to public commentary on the performance of songs and poems in the preliterary era of ancient Greece. Yet, as this book shows, it should-if, that is, we wish to understand where literary criticism as we think of it today came from. By "literary criticism" we usually mean a self-conscious act involving the technical and aesthetic appraisal, by individuals, of autonomous works of art.