The measurement of frequency and allied quantities in wireless telegraphy

It has been customary during the past three decades to define the oscillation-frequencies of ¿wireless¿ in terms of the lengths, in metres and kilometres, of the corresponding ether waves. During the past few years there has arisen a tendency to abandon the indirect definition and to state the frequencies themselves, in cycles per second or in kilocycles per second. The paper suggests as a further alternative the description of frequencies in terms of ¿pitch,¿ a term which is defined as a relationship of the particular frequency to some standard frequency. The proposed standard is the frequency of 1 cycle per second, and the relationship suggested is such that the ¿pitch¿ is a logarithm of the ratio between these frequencies. Some of the possible advantages of the use of ¿pitch¿ are described, and particular emphasis is laid on the advisability of employing it in the case of very short waves.