vi CONTENTS. 



LECTURE V. 



BY W. FROUDE, ESQ., LL.D., F.R.S. 



PAGE 



THE LAWS OF FLUID RESISTANCE 88 



LECTURE VI. 



BY DR. SIEMENS. 



THE BATHOMETER 122 



LECTURE VII. 



INSTRUMENTS FOR EXPERIMENTS ON SOUND 137 



ON TEMPERAMENT 157 



LECTURE VIII. 



BY PROFESSOR BARRETT. 



SENSITIVE FLAMES AS ILLUSTRATIVE OF SYMPATHETIC 



VIBRATION 183 



LECTURE IX. 

 BY PROFESSOR T. F. PIGOT. 



LIGHTHOUSE ILLUMINATION 201 



LECTURE X. 



BY PROFESSOR FORBES. 



THE VELOCITY OF LIGHT . 212 



