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 :

GIVING SOME

ACCOMPT

OF THE

Present Undertakings, Studies, and Labours

OF THE

I N G E N I O U S

In many

Considerable Parts

OF THE

W O R L D.

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.