The use of a trained sea lion to locate and attach a retrieval device to submerged instruments and test equipment is described. (CP)

Describes the author's visit to the Italian cities where Galileo lived. Discusses the legendary swinging Cathedral lamp and the Leaning Tower of Pisa. Describes the science apparatus used by Galileo and other men of science which appear in the Museum of the History of Science in Florence. Presents six pictures of items viewed within the museum.…

Describes a demonstration in which a ball is placed in an unstable position on a saddle shape. The ball becomes stable when it is rotated above some threshold angular velocity. The demonstration is a mechanical analog of confining a particle in a "Paul Trap". (DDR)

While it is a commonplace in the historiography of electricity that itinerant lecturers and instrument makers were "somehow" part of the "electrical flare" of the 18th century, very little is actually known about them, about their background, their careers and their self-understanding. Yet, research focusing on these…

CCD spectrometers available at Stockholm House of Science allow students to measure the radiation from the Sun. Students are fascinated by the information that can be gathered from the spectrum, including the temperature of the solar surface and the presence of certain elements in both the Sun's atmosphere and the Earth's.