MAKE A MEME View Large Image Hadley's reflecting quadrant.png Drawing of John Hadley's Reflecting Quadrant Hadley Hadley ™s Octant Philosophical Transactions of the Royal Society vol 37 p 147 1731 1731 John Hadley I added the English text identifying the parts along ...
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Keywords: Hadley's reflecting quadrant.png Drawing of John Hadley's Reflecting Quadrant Hadley Hadley ™s Octant Philosophical Transactions of the Royal Society vol 37 p 147 1731 1731 John Hadley I added the English text identifying the parts along with curved arrows The original alphabetic tags will be too small to see in a thumbnail Octants PD-old-100
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