From the preface by Henri Kling: \"The present Method is intended both for the Natural or Stop-Horn and for the Valve or Ventil-Horn. In order to obtain a thorough mastery in horn playing, it is extremely advisable to begin with the study of the Natural Horn, for the purpose of acquiring the true quality of tone characteristic of the instrument and which is attained by but few hornists. They generally treat the instrument as though it were a Cornet...