CONTENTS. 



LECTURE ^ 



I. ON THE RELATION OF NATURAL SCIENCE TO SCIENCE IN 

 GENERAL. Translated by H. W. EVE, Esq., M^A., F.C.S., 

 Wellington College 1 



II. ON GOETHE'S SCIENTIFIC RESEARCHES. Translated by H.- W. 



EVE, Esq. 33 



(III. ON THE PHYSIOLOGICAL CAUSES OF HARMONY IN Music. 



Translated by A. J. ELLIS, Esq., M.A., F.R.S. ... 61 



IV. ICE AND GLACIERS. Translated by -Dr. ATKINSON, F.C.S., 



Professor of Experimental Science, Staff College . . .107 



V. ON THE INTERACTION OF THE NATURAL FORCES. Translated 



by Professor TYNDALL, LL.D., F.R.S 153 



VI. THE RECENT PROGRESS OF THE THEORY CF VISION. Translated 



by Dr. PYE-SMITH, B.A., F.R.C.P., Guys Hospital : 



I. The Eye as an Optical Instrument . . . .197 



IT. The Sensation of Sight . . . . . .229 



m. The Perception of Sight 270 



VII. ON THE CONSERVATION OF FORCE. Translated by Dr. AT- 



KINSON .317 



V1JI. ON THE AIM AND PROGRESS OF PHYSICAL SCIENCE. Translated 



by Dr. W. FLIGHT, F.C.S., British Museum . . . .363 



