CONTENTS ix 



PAGE 



That Powdered Glass is a Poison 211 



That a Man Becomes of Age on His Twenty-first Birthday . . 211 



That " The Exception Proves the Rule " 213 



That Cinderella's Slipper was of Glass 214 



That Glass is Very Hard 215 



That Frankenstein was a Monster 216 



Words which convey Erroneous Ideas 219 



Knowledge is Power 225 



