Kathleen Schlesinger, 1911 Encyclopædia Britannica, Volume 9… (1911)
“ The Germans classify brass wind instruments as whole and half [1] according to whether, having the wide bore of the bugle, the whole length of the tube is available and gives the fundamental proper to an organ pipe of the same length or whether by reason of the narrow bore in proportion to the length, only half the length of the instrument is of practical utility, the harmonic series beginning with the second harmonic. ”
