Lesson 46 Electric Clock. With the discovery of electromagnetism Alexander Bain Invented the electric clock. Electric clocks will generally keep perfect time and be small. The rivalry between Bain and Wheatstone raised awareness of the electric clock and people started making their own versions. Today digital clocks are used to power GPS and keep time perfectly.
Lesson 47 Blueprints. John Herchel invented the blueprinting process in 1842. Blueprinting made it easy to reproduce drawings and were hard to make changes to. They quickly spread to the architectural industry and were used among scientists. Blueprints made it easier to construct large facilities but have been replaced by computers today.
Lesson 48 Stapler. Samuel Slocum invented the stapler in 1841 while trying to figure out how to ship his pins. Staplers are tools that make it quick and easy to bind sheets of paper together. Numerous inventors invented different models of the stapler in the 1900s. The Swingline stapler became the standard stapler thanks to its top-loading design.
Lesson 49 Grain Elevator. Joseph Dart was an entrepreneur who spotted the opportunity to invent the grain elevator in 1842. Grain elevators quickly remove grain from ships to store it. dart’s engineer, Dunbar, built many grain elevators all over the US. Their invention enabled the US to become the leading grain producer in the world.