He pointed the indicator to the word "down," and at once began dropping through the air. He experienced the sensation one feels while descending in an elevator. When he reached a point just above the town he put the indicator to the zero mark and remained stationary, while he examined the place. But there was nothing to interest him, particularly; so after a brief survey he once more ascended and continued his journey toward the east.
At about two o'clock in the afternoon he reached the city of Boston, and alighting unobserved in a quiet street he walked around for several hours enjoying the sights and wondering what people would think of him if they but knew his remarkable powers. But as he looked just like any other boy no one noticed him in any way.
It was nearly evening, and Rob had wandered down by the wharves to look at the shipping, when his attention was called to an ugly looking bull dog, which ran toward him and began barking ferociously.
"Get out!" said the boy, carelessly, and made a kick at the brute.
The dog uttered a fierce growl and sprang upon him with bared teeth and flashing red eyes. Instantly Rob drew the electric tube from his pocket, pointed it at the dog and pressed the button. Almost at the same moment the dog gave a yelp, rolled over once or twice and lay still.
"I guess that'll settle him," laughed the boy; but just then he heard an angry shout, and looking around saw a policeman running toward him.
