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jere7my: Sundial gnomon
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jere7my: Sundial sphere
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jere7my: Me and the time
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jere7my: Base of the sundial
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jere7my: Sundial and symbols
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jere7my: Half past ten
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jere7my: Bisected gnomon
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jere7my: Sphere and line
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jere7my: Passing X
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jere7my: Sun and sphere
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jere7my: Throwing sunlight
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jere7my: "Now witness the awesome power of this fully operational battle station!"
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jere7my: Gilt brass astrolabe
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jere7my: Ptolemaic armillary sphere
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jere7my: Box sextant
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jere7my: Leyden jar
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jere7my: Galileo's astrolabe
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jere7my: Small astrolabe
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jere7my: Spherical mirror armillary
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jere7my: Spherical mirror armillary
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jere7my: Spherical mirror armillary
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jere7my: Spherical mirror armillary
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jere7my: Spherical mirror armillary with photographer
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jere7my: Ivory sundial
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jere7my: Giusti quadrant with magic square
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jere7my: Nocturnal and sundial
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jere7my: Nocturnal
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jere7my: Kendra tests a nocturnal
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jere7my: Cylinder mirror illusion
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jere7my: Pinhole spectacles