December 11 – Kaleidoscope Day

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nToday is the birthday of the man who invented the kaleidoscope, Sir David Brewster. This Scottish scientist / inventor was born on this date in 1781.
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nSomeone, somewhere, decided that December 11 would be a great day to celebrate this fun optical toy.
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nDo you own a kaleidoscope? Have you ever made one? 
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nHere’s what the view through a kaleidoscope can look like:
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nAnd here’s how a kaleidoscope works:
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nThe wonderful images are created by the reflections of reflections of reflections – of the three mirrors:
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nAnd here‘s a step-by-step in making one type of kaleidoscope.
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nAlso on this date:

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nAnniversary of the dedication of a monument to the boll weevil! 

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nAstronomer Annie Jump Cannon’s birthday

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nUNICEF’s birthday

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nInternational Mountain Day

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nPhysicist Max Born’s birthday

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Proclamation of the Republic Day in Burkina Faso

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nAnniversary of the first recorded sighting of the Aurora Borealis in America

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nIndiana’s statehood day

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nPlan ahead:

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nCheck out my Pinterest pages on:

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• nDecember holidays 

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• nDecember birthdays

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• nHistorical anniversaries in December

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nAnd here are my Pinterest boards for:

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• nJanuary holidays 

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• nJanuary birthdays 

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• nHistorical anniversaries in January

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