Induction Coils, How to Make, Use, and Repair Them. Including Ruhmkorff, Tesla, and Medical Coils, Roentgen Radiography, Etc. Etc.

CHAPTER VII.

Chapter 723 wordsPublic domain

CURRENTS IN VACUO.

Different Forms of Mercury Air Pumps. Geissler Tubes. Discharges in Vacuo. Characteristic Colors of Different Gases in Tubes, etc. 140-152