Index of content:
Volume 10, Issue 10, October 1939
- CONTRIBUTED ARTICLES
The Compensation of Temperature Errors in Millivoltmeters A Study of the Swinburne Method for Minimum Energy Loss10(1939); http://dx.doi.org/10.1063/1.1751444View Description Hide Description
10(1939); http://dx.doi.org/10.1063/1.1751445View Description Hide Description
A precision current stabilizer is described which is suitable for controlling an electromagnet. The circuit is adaptable to a wide range of current values. Applications to a cyclotron and to a beta‐ray spectrometer are discussed. Currents have been stabilized over a period of several hours to better than 1 part in 50,000.
10(1939); http://dx.doi.org/10.1063/1.1751446View Description Hide Description
The history and originators of previous devices for detecting mercury are given. The features of the new detector are given along with its operation and characteristics. It is relatively small and portable; it can be used for testing the mercury content of the atmosphere or, by adding some auxiliaries, for testing the flue gas from a mercury boiler. Its direct useful range is from one part per million to one part per billion by volume.
10(1939); http://dx.doi.org/10.1063/1.1751447View Description Hide Description
A linear pulse amplifier is described which utilizes the principle of negative feedback. The amplifier is substantially unaffected by changes in supply voltages and provides either positive or negative output pulses with practically exact linearity and little backwave. The circuit components are easily obtainable and of moderate cost. A mechanical design is suggested which minimizes the labor of construction.