The article describes some experiments, with a new geometrical approach, on the relationship between the magnetic force on a conductor, electric current and length. […]
Low pressure discharge lamps, filled with mercury or sodium, are commonly used for highways and tunnels illumination, especially against fog. A simple, low cost, monochromatic light source may be obtained by means a sodium lamp of this type. […]
An E.H.T. generator which may be used in all experiments and demonstrations instead of the old fashioned electrostatic machines is described. It has none of the drawbacks of the old machines and its design gives special attention to the safety of the operator. […]
This paper describes a simple method for measuring the heat developed by friction, in which a thermometer in used as a calorimetric device. […]
We describe, in this paper, a measurement of the density of air, using the equation of state for gases and Archimede’s law. […]