This job offers a complete and through description of techonological changes that occurred between the years 1877 and 1919 and how it affected the population in the U.S.
The following information is taken from "The Timetables of History", the new third revised edition by Bernard Grun, 1991. Generally, I have listed only issues that I consider "technology." In other words, I have not included scientific discoveries that were very important in biology, chemistry, and physics. I have restricted myself to technology issues only.
Most of the inventions and developments listed below are rather self-explanatory. For ones you may not know, just look them up in an encyclopedia or at Google. They should be easy to find.
The implications on life in America is rather obvious most of the time.
Edison invented the phonograph (beginnings of sound recording)
David Hughes invented the microphone (think about the ramifications here)
Mannlicher produced the first repeater rifle (the art of war will change dramatically)
A.A. Pope manufactured first bicycles in the U.S.A. (pleasure rides throughout America)
Edison and Swan independently devised the first practical electric lights (no more oil lamps)
James Wimshurst invented the electrostatic generator
Edison designed first hydroelectric plant in Appleton, Wisconsin (power plants means growth of urban centers)
Hiram Maxim patented the recoil-operated machine gun (once again, we've got war ...
Resources about techonological changes that occurred between the years 1877 and 1919 are given.