Dean had trouble remembering who was who but all were of like mind in their affection for the old man who turned up the charm meter a notch or two.
Double Image Micrometers are described in the article HELIO METER (q.v.).
Forms of open circuit wave meter have been devised by Slaby and by Fleming.
Slaby's wave meter consists of a helix of non-insulated wire wound on a glass tube.
2 In Donitz's wave meter a condenser of variable capacity is associated with inductance coils of various sizes, and the wave meter is placed near the antenna so that its inductance coils have induced currents created in them.