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

by H. S. Norrie

Fig. 45.

Fig. 46.

Fig. 47.

Fig. 45 shows a solution tube to be filled with solution of sulphate of quinine, etc.