CHAPTER VII.
CURRENTS IN VACUO.
Different Forms of Mercury Air Pumps.
Geissler Tubes. Discharges in Vacuo.
Characteristic Colors of Different Gases
in Tubes, etc. 140-152
Induction Coils, How to Make, Use, and Repair Them. Including Ruhmkorff, Tesla, and Medical Coils, Roentgen Radiography, Etc. Etc. · 第 7 / 16 章