Philosophical Transactions/Volume 6/Number 80
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(3075)
Numb.80.
PHILOSOPHICAL
TRANSACTIONS.
February 19. 167172
The CONTENTS.
A Letter of Mr. Isaac Newton, Mathematick Professor in the University of Cambridge; containing his New Theory about Light and Colors: Where Light is declared to be not Similar or Homogeneal, but consisting of difform rays, some of which are more refrangible than other: And Colors are affirm'd to be not Qualifications of Light, deriv'd from Refractions of natural Bodies, (as 'tis generally believed;) but Original and Connate properties, which in divers rays are divers: Where several Observations and Experiments are alledged to prove the said Theory.An Accompt of some Books: I. A Description of the EAST-INDIAN COASTS, MALABAR, CORMANDEL, CEYLON, &c. in Dutch, by Phil. Baldæus. II. Antonii le Grand INSTITUTIO PHILOSOPHIAE, secundùm principia Renati Des-Cartes; novâ methodo adornata & explicata. III.An Essay to the Advancement of MUSICK; by Thomas Salmon M. A. Advertisement about Thæon Smyrnæus. An Index for the Tracts of the Year 1671.