IV CONTENTS. 



PAGE 



CHAPTER XII. 



(Ti-iniliiig, Figurinp;, and Testing Plane Mirrors 25 



CHAPTER XIII. 



Testing and Figuring Paraboloidal Mirrors 30 



CHAPTER XIV. 



Testing and Figuring Convex Ilyperboloidal Mirrors 38 



CHAPTER XV. 

 Silvering 40 



CHAPTER XVI. 



A Support-system for Large Mirrors 43 



CHAPTER XVII. 

 A Mounting for a Large Reflecting Telescope 46 



