When the final stake was pounded in to complete the transcontinental railroad at Promontory Point in Utah in 1869, church bells sounded simultaneously on the East and West Coasts and people across the country began to celebrate. How did this event demonstrate the power of the telegraph

The telegraph was used to communicate the exact time of nailing the final stake to the East and West Coast              

Explanation:

With the aid of the telegraph developed by Samuel Morse in the 1840s, messages on the exact time of pounding in the final stake to the railway line was transmitted to the East and West Coasts simultaneously which made the sounding of the bells at the same time possible. The telegraph as at then was the fastest means of sending messages across long distances and it worked by transmitting electrical signals over laid down wires from station to station, and by 1866, a telegraph line connected America to far away Britain