WHEN an electric glow discharge is passed through a tube containing air at pressures of the order of 5 cm. of mercury, the tube lying in one of the two beams in a Jamin's refractometric arrangement, ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Bourns, Inc. has expanded its next generation of gas discharge tube (GDT) series with the addition of a high voltage 2-electrode overvoltage protector family. The Model GDT28H Series is designed for ...

Brass base shell with plaster insulator, two copper contacts. Single-arch (carbon?) filament, braided and coated, with flat press, glass bead insulator, platinum (?) leads, and soldered (?) connectors ...