WWER DIVISION 



CONTENTS. 



LECTUKE I. 



BY CAPTAIN ABNEY, R.E., F.R.S. 



PAGE 



PHOTOGRAPHY .......,...,.. 1 



V LECTURE II. 



BY PROFESSOR STOKES. 



THE ABSORPTION OF LIGHT AND THE COLOURS OF NATURAL 



BODIES ......... ....... 33 



FLUORESCENCE .... ........ . . . . 54 



LECTUKE III, 



BY PROFESSOR A. B. W. KENNEDY, C.E., OF UNIVERSITY COLLEGE, 

 LONDON. 



THE KINEMATICS OF MACHINERY ......... 76 



LECTURE IV. 



BY F. J. BRAMWELL, ESQ., MEMBER OF THE INSTITUTE C.lf., F.R.S. 



ON THE STEAM-ENGINE . . . \ 



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