17th-century inventions

A piano is a keyboard instrument that produces sound when its keys are depressed, activating an action mechanism where hammers strike strings. Modern pianos have a row of 88 black and white keys—with the exception of the Bosendörfer and Stuart & Sons pianos—and tuned to a chromatic scale in equal temperament. A musician who specializes in piano is called a pianist.

thumb|The 100-inch (2.54 m) Hooker reflecting telescope at [[Mount Wilson Observatory near Los Angeles, used by Edwin Hubble to measure galaxy redshifts and discover the general expansion of the universe.]]

thumb|An analog barometer

utensil for cooking food under high pressure steam

mechanical analog computer

thumb|A digital thermostat thumb|right|Honeywell's "The Round" model T87 thermostat, one of which is in the collection of the [[Smithsonian.]] thumb|right|A touch screen thermostat thumb|right|An electronic thermostat in a retail store

thumb|Three types of corkscrew: two modern (left and bottom) and one old (right) thumb|upright|A basic corkscrew

telescope design that collects and focuses light with a combination of mirrors

thumb|A Pascaline signed by Pascal in 1652 thumb|Top view and overview of the entire mechanism. This version of Pascaline was for accounting.

early type of image projector

timekeeping device

equipment producing low air pressure

mechanical machine for arithmetic operations for absolute calculators

type of windmill

source of light

bottle for holding snuff powder

high-pressure cooker invented by Denis Papin in 1679 to allow paupers to consume bones and low-quality meat

toy gun