Similar Material g70 3/22 pp. 21-23 How Does Your Radio Work? Radio—An Invention That Changed the World Awake!—1996 Do You Believe Only What You Can See? The Watchtower Announcing Jehovah’s Kingdom—1956 The Modern Marvel of Sound Amplification Awake!—1978 Waves of Energy Awake!—1974 Listening to the Universe Down Under Awake!—2003 Flying “Blind”—How Do They Do It? Awake!—1984 WBBR Sold by the Watch Tower Bible and Tract Society The Watchtower Announcing Jehovah’s Kingdom—1957 Society Uses Many Means to Expand Preaching Centennial of the Watch Tower Bible and Tract Society of Pennsylvania Part 13—Champions of Freedom of Speech and of Worship The Watchtower Announcing Jehovah’s Kingdom—1955 Understanding and Enjoying Music Awake!—1979