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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

larger cylinder. Clamped to the torsion micrometer is a 76cm long metallic wire with a diameter of 0.04mm which holds a copper or iron rod (fig.3, bottom right) of 0.2cm diameter on its bottom end. The rod

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

Henley's Quadrant Electrometer Listen Henley's variation of a quadrant electrometer consists of an upright column with a brass stand. Attached to the column is a wire with an elder pith ball. If the i

Leyden Jars Listen A newly developed instrument shocked (most literally) scientists researching electricity in 1745: the Leyden Jar or Amplifiying Jar. The Prelate Ewald Jürgen von Kleist and the Leyd

Tangent Galvanometer Listen A galvanometer measures an electrical current by means of the electromagnetical properties of an induction coil and the Lorentz force. The instrument contains various coils