CHAPTER XXI.
THE PROFESSOR'S LECTURE.
"In Science——in fact, in most things——it is usually best to begin at the beginning. In some things, of course, it's better to begin at the other end. For instance, if you wanted to paint a dog green, it might be best to begin with the tail, as it doesn't bite at that end. And so——"
"May I help oo?" Bruno interrupted.
"Help me to do what?" said the puzzled Professor, looking up for a moment, but keeping his finger on the book he was reading from, so as not to lose his place.
