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Sikes's Hydrometer Listen The hydrometer is a measurement device to determine the mass density of liquids. It was developed in the early 19th century and put to use by the British Customs Services to

Hydrostatic Balance on the model of 's Gravesande Listen This device is used to determine the density of liquids. To do so the two cups below the scale pans are filled with different liquids. Attached

Galileo's Inclined Plane Experiment Listen Galileo's inclined plane is a wooden beam of approximately 6,7m length the top of which has a hemicircular vellum-bound notch. The vellum is used in order to

Demonstration device for the parabolic flight curve according to ‘sGravesande Listen The demonstration device according to 'sGravensande and van Musschenbroek is first mentioned in the 1742 edition of

Mouchot's Solar Heater Listen The Solar Heater on the model of Mouchot is a heliothermal engine by which food or water can be heated by solar radiation. Augustin Mouchot developed a string of heliothe

Geiger Müller counter tube Listen The Geiger Müller counter tube is one of the earliest measurement devices for the field of radioactivity. Walter Müller developed it under the auspices of his thesis

Millikan's apparatus for the determination of the elementary charge Listen From 1909 until 1911 Robert A. Millikan together with his assistant Harvey Fletcher conducted experiments to determine the el

Barlow's Wheel Listen Barlow's Wheel is the prototype of unipolar engine. Peter Barlow published its description in 1822 in the article "A curious electro-magnetic experiment". The star-shaped copper

Coulomb's Torsion Balance Listen Coulomb's Torsion Balance is a setup based on two glass cylinders, one of 65cm length with a torsion micrometer (fig.2, right) is placed on a glass plate that rests on

Electrostatic Generator Listen The electrostatic generator is one of many variants of a frictional electrical machine used in the second half of the 18 th century. It became standard equipment for the