A peculiar gap exists between the accepted theoretical basis of instruction in singing and the actual methods of vocal teachers. Judging by the number of scientific treatises on the voice, the academic observer would be led to believe that a coherent Science of Voice Culture has been evolved. Modern methods of instruction in singing are presumed to embody a system of exact and infallible rules for the management of the voice. Teachers of singing in all the musical centers of Europe and America claim to follow a definite plan in the training of voices, based on established scientific principles. But a practical acquaintance with the modern art of Voice Culture reveals the fact that the laws of tone-production deduced from the scientific investigation of the voice do not furnish a satisfactory basis for a method of training voices.