Water wheels
Cornelius Vanderbilt
pictures of calculating devices with their inventors
Your vagina
10 fingers
Acoustic couples
No, journalists who exposed corrupt industrialists, politicians, and the wealthy during the late 19th and early 20th centuries were typically referred to as muckrakers. Mugwumps were a political faction in the late 19th century that sought to remain independent from party politics.
Early models of flashlights.
Early humans
early 1800s
abacus
Rage Against the Machine is the name of a song from the early 2000 which begins with one or two guys talking about a time machine.
There was a lot of cast iron in early sowing machines.