WHAT IS SOUND?
Do you know that hearing is just feeling with the ear? That in reality, the thing we call sound, which we think of as a noise or as a musical note, is just an impression on the brain? Very few boys know this, and if you would like to be one of the few that do, you surely want an outfit of
Gilbert Sound Experiments
With one of these outfits you can find out just what sound is—how it is produced—why some pianos sound better than others—why a violin produces a musical tone, and many other things, including a number of startling table rapping tricks with which you can astonish your friends. A big book of instructions tells you how to perform every experiment. Get one of these outfits today. The best toy dealer in your town should have it; if not, write us and we’ll tell you where you can get it.
THE A. C. GILBERT COMPANY
514 BLATCHLEY AVE. NEW HAVEN, CONN.
In Canada: The A. C. Gilbert-Menzies Co., Limited, Toronto
In England: The A. C. Gilbert Co., 125 High Holborn, London, W. C. 2
