Choose two inventions from this Era of Invention (1850-1900) and explain why they changed the world of their time and why they are still important. Use specific examples and identify the people who were the agents of change in each example.

Here's a List of Inventions between 1850 and 1900.

- Invention: Battery.

Invented by: Alessandro Volta

A battery is a chemical reactor that stores energy, which can be used in electrifying. As a chemical reactor, the primary function of a battery is the production of electrons mobilized to go through or power an external device. Nowadays, batteries are needed everywhere and have been a better invention for the present world.

- Invention: Stethoscope.

Inventor: Rene Laennec

When medical practitioners needed to check the heartbeat of patients, they were only limited to placing their ears carefully on a patient’s heart. There was no means of auscultation, and the old medium always does not yield the desired results.  A man named Rene Laennec thought of how to listen carefully to the sounds in the chest. He couldn’t use the usual method to examine his fat patient. He started by rolling a sheet of paper into a tube shape, placing each end on the patient’s heart and ear. When medical practitioners needed to check the heartbeat of patients, they were only limited to placing their ears carefully on a patient’s heart. There was no means of auscultation, and the old medium always does not yield the desired results.  Today, a stethoscope has become a very vital piece for doctors. Modern Day stethoscope can amplify the sounds in the chest.

- Invention: Matches.

Inventor: John Walker

Before this invention, lighting the fire was almost an unknown thing for everyone. The fire has been in existence for thousands of years, but no one knew how to create or start one ideally. The first idea of lighting a fire was brought about by a British Pharmacist, John Walker.

- Invention: Microphone.

Inventor: Charles Wheatstone

His invention was based on how to transmit sound waves through mediums from one place to another, regardless of the distance. His curiosity to come up with something to convey sound leads to the microphone being invented. A microphone can propagate weak sound waves to become audible.

- Invention: Typewriter.

Inventor: W. A Burt

The first generation of the typewriter was invented at that time, there were no other means by which people could write letters, or document anything other than writing. A typewriter is a manual machine with keyboards, used for typing out data.  An American inventor named William Burt was the first to patent the typewriter. From the start of the 1850s, the typewriter became very useful in offices and media houses. It would later be improved by contributions like Samuel Soule, Carlos Glidden, and Christopher Sholes.

- Invention: Sewing Machine.

Inventor: Barthelemy Thimonnier

The machine at the time was a hooked tambour needle operated in a chain stitch form. It was later rejected, and Bart’s workshop was destroyed after he began executing large contracts for the military.  Usually, local tailors at that time made money from stitching with bare hands; the only crude means they had to settle for. The fear of losing their jobs to the mechanical machine made them hate Bart’s invention. This was the first type of sewing machine ever designed. The further upgrade was also recognized after Bart’s sewing machine.

- Invention: Corn Planter.

Inventor: Henry Blair

The popularity came in 1800's when the corn planter he invented saved time and energy of planting for a long time. The corn planter helped control weed as well. Henry had to declare himself a free man before he could patent the corn planter.

the number of calories in each pack of cookies has a greater variation than the number of calories in each pack of crackers.

in 1897, pershing became a tactical officer at west point, and that's where he was given the nickname "black jack." pershing's first name is "john," for which "jack" is a nickname, and he was a white man who commanded black troops. hence "black jack".