OUTLINES 



OF 



NATURAL PHILOSOPHY, 



BEING 



HEADS OF LECTURES 

 DELIVERED IN THE UNIVERSITY OF EDINBURGH, 



BY 



JOHN PLAYFAIR, 



PROFESSOR OP NATURAL PHILOSOPHY IN THE UNIVERSITY OP EDINBURGH, 



FELLOW OF THE ROYAL SOCIETY OF LONDON, 



SECRETARY OF THE ROYAL SOCIETY OF EDINBURGH, 



AND HONORARY MEMBER OF THE ROYAL MEDICAL SOCIETY OF EDINBURGH. 



VOL. I. 



THIRD EDITION. 



EDINBURGH: 



PRINTED FOR ARCHIBALD CONSTABLE AND COMPANY, EDINBURGH, 



Af'D LONGMAN, HURST, REES, ORME & BROWN, 



AND CADELL & DAVIES, LONDON. 



1819. 



