Complex sentence: From the 1830s onward the Penny press began to play a major role in American journalism and technological advancements such as the telegraph and faster printing presses in the 1840s helped expand the press of the nation as it experienced rapid economic and demographic growth.
Split into simpler sentences: From the 1830s onward, the Penny press began to play a major role in American journalism. Technological advancements such as the telegraph and faster printing presses in the 1840s also helped to expand the press of the nation as it experienced rapid economic and demographic growth.