Abstract
The first part on electrotechnics deals with the following subjects: mathematics-theoretical principles of electronics special calculation methods-units. electrical measurement technics - vacuumtechnik - flows in vacuum and gas- lectrochemistry- special materials for electronics- semiconductors modulation technique- standardization- documentation in electrotechnics- tables. Vol. III : This third part on electrotechnics deals with telecommunication. The following subjects are treated special theories for communication technics; apparatus and equipment; telecommunication technics; high frequency technics; electro acoustics; theory and programming of computers.