File:Alexander Graham Bell in Brantford, Ontario, Canada -Reverend Thomas Henderson -Bell family friend and first Bell agent in Canada.JPG - Wikimedia Commons
File:Alexander Graham Bell in Brantford, Ontario, Canada -Melville James Bell, elder brother to Alexander Graham, who's death led to the Bell's emigration to Canada, c.1870.JPG - Wikimedia Commons
![CAN YOU HEAR ME NOW? “If I could make a current of electricity vary in intensity precisely as the air varies in density during the production of sound, - ppt download CAN YOU HEAR ME NOW? “If I could make a current of electricity vary in intensity precisely as the air varies in density during the production of sound, - ppt download](https://slideplayer.com/slide/13156887/79/images/7/References+Alexander+Graham+Bell+-+Inventions+-+HISTORY.+com.+%28n.+d.+%29.jpg)