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Maple syrup: 'The savages have practised this art, longer than any now living among them, can remember'; and, 'A discourse concerning the air's gravity' - in a rare complete issue of Philosophical Transactions, published for the Royal Society of London, No. 171, May 20th, 1685.


(Oxford): Printed... for Sam Smith, 1685. Pp987-1026 [numbered sequentially from previous issues]. Illustrated with engraved plate. An original part, disbound from a larger volume.

Condition: Text block loosening but still held together as one piece by binder's string. Fore-edge of plate closely trimmed, and with small chip to margin. Light age-toning to some leaves, and minimal spotting. 

Includes an early (if not, the earliest), account of the harvesting of sap from the maple tree by native Canadians, and an account of the gravity of air by John Wallis. The plate shows a large bladder stone, and a shell found in the kidenys of a woman.

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