DescriptionPractical Electrics Mar 1924 pg249.png Practical Electrics, March 1924. Volume 3 Number 5. Published by Experimenter Publishing Company Inc...
It would cover two octaves. Image:Practical Electrics Mar 1924 Cover.png Image:Practical Electrics Mar 1924 pg249.png The page numbers were on an annual...
It would cover two octaves. Image:Practical Electrics Mar 1924 pg248.png Image:Practical Electrics Mar 1924 pg249.png The page numbers were on an annual...
