P H I L O S O P H I C A L
T r a n s a c t i o n s :
Present Undertakings, Studies, and Labours
Vol. IX. Beginning the Second Century.
For the Year MDCCXIV.
L O N D O N,
Printed by T. R. for John Martyn, Printer to the Royal Society
at the Bell in St. Pauls Churchyard.
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