Sundials

Author: Albert Waugh
Publisher: Courier Corporation
ISBN: 0486140008
Format: PDF, ePub, Docs
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A rigorous appraisal of sundial science includes mathematical treatment and pertinent astronomical background, plus a nontechnical treatment so simple that several of the dials can be built by children. 106 illustrations.

Sundials

Author: Albert Edmund Waugh
Publisher:
ISBN: 9780895773821
Format: PDF, ePub
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Easy to make Wooden Sundials

Author: Milton Stoneman
Publisher: Courier Corporation
ISBN: 0486241416
Format: PDF
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This guide to making wooden sundials gently leads beginning diallists into sundial lore and construction. Novice craftsmen who can wield a saw, wood-burning pen, matte knife, sandpaper and a few other simple tools can make five different kinds of sundials; plans are flexible and allow for embellishment, alteration, variety of materials. Precalculated templates can be removed from the book and carbon-paper-transferred to wood.

Eine kurze Geschichte der Menschheit

Author: Yuval Noah Harari
Publisher: DVA
ISBN: 364110498X
Format: PDF, Mobi
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Krone der Schöpfung? Vor 100 000 Jahren war der Homo sapiens noch ein unbedeutendes Tier, das unauffällig in einem abgelegenen Winkel des afrikanischen Kontinents lebte. Unsere Vorfahren teilten sich den Planeten mit mindestens fünf weiteren menschlichen Spezies, und die Rolle, die sie im Ökosystem spielten, war nicht größer als die von Gorillas, Libellen oder Quallen. Vor 70 000 Jahren dann vollzog sich ein mysteriöser und rascher Wandel mit dem Homo sapiens, und es war vor allem die Beschaffenheit seines Gehirns, die ihn zum Herren des Planeten und zum Schrecken des Ökosystems werden ließ. Bis heute hat sich diese Vorherrschaft stetig zugespitzt: Der Mensch hat die Fähigkeit zu schöpferischem und zu zerstörerischem Handeln wie kein anderes Lebewesen. Anschaulich, unterhaltsam und stellenweise hochkomisch zeichnet Yuval Harari die Geschichte des Menschen nach und zeigt alle großen, aber auch alle ambivalenten Momente unserer Menschwerdung.

German

Author: Joseph Rosenberg
Publisher: Courier Corporation
ISBN: 9780486202716
Format: PDF, Mobi
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Filled with dialogues, grammar and idiom studies, and practical exercises, this is probably the most delightful, useful, and comprehensive elementary book available for learning spoken and written German. In addition, the book features 28 sketches of specific scenes with pertinent items numbered and identified in both German and English. Includes 330 photographs and illustrations.

Time A Bibliographic Guide

Author: Samuel L. Macey
Publisher: Routledge
ISBN: 0429685130
Format: PDF, ePub, Docs
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Originally published in 1991. A multidisciplinary guide in the form of a bibliography of selected time-related books and articles divided into 25 existing academic disciplines and about 100 subdisciplines which have a wide application to time studies.

Mathematics Galore

Author: Christopher Budd
Publisher: Oxford University Press
ISBN: 9780198507703
Format: PDF
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This book is a series of self-contained workshops in mathematics which aim to enthuse and inspire young people, their parents and teachers with the joy and excitement of modern mathematics. Written in an informal style, each chapter describes how novel mathematical ideas relate directly to real life. The chapters contain both a description of the mathematics and its applications together with problem sheets, their solutions and ideas for further work, project and field trips. Topics include; mazes, folk dancing, sundials, magic, castles, codes, number systems, and slide rules. This book should be accessible to young people from age thirteen upwards and yet contains material which should stretch the brightest students.

Measuring Time

Author:
Publisher: National Academies
ISBN:
Format: PDF, ePub, Docs
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This unit is divided into two sections: Keeping time with the sun and the moon and Investigating invented clocks. In the first section, students observe the apparent motion of the sun and the recurring cycle of the moon's phases. In the second section, students plan and conduct experiments with some of the principal timekeeping devices developed through the ages.