Technology and Invention (57-58) and A Booming Economy (59-62) With reference to the telephone, air travel, the discovery of insulin and radio, EXPLAIN how the 1920s was an era of innovation and discovery.
At beginning of decade only 25% of Canadian homes had a telephone
These phones required a crank and the mouth and ear piece were separated
Dial telephone appeared in Toronto in 1924, and phones now had a combined mouthpiece and earphone
By end of decade, almost 75% of Canadians had telephones in their home