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Finding the north-south line by shadows: „Die Mittaglinie zu finden durch 2. Schatten eines nach der Bleywaag auffgeneckten Fadens /

Monday, November 28th, 2011

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The Art of Measuring Deviation

Tuesday, March 22nd, 2011

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Geography Relates to the Face – As Chorography to the Ear and the Eye

Sunday, March 6th, 2011

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First: The Poles of the Sky

Friday, March 4th, 2011

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