Viii CONTENTS. 



PAGE 



APPENDIX TO PAGE 18. 



Development of Knowledge of Heat from 1650. — 

 Hooke's Vibratory Theory of Heat and Light. — Heat as a 

 Measurable Fluid. — Heat as an Indestructible Fluid. — 

 "Caloric" Invented by Lavoisier. — Extracts from " Micro- 

 graphia," by Hooke. — Extracts from " Traite Elementaire 

 de Chimie," Lavoisier 173 



NOTE A TO PAGE 88. 



Reference to the Views of Roget and Faraday. — 

 "Force," destructible and "Force," indestructible. — Extract 

 from Faraday's "Experimental Researches in Electricity"... 187 



ERRATA. 



Second paragraph, for the full realizing of this general signi- 

 ficance^ read for the full realization of their general significance. 

 p. 73, for 1893 read 1843. 

 p. no, fifth line from the bottom of the page, for In June, 



read On August 18. 



