"Mr. Ernest Skinner, an eminent American organ-builder,[2] likens the discovery of the leathered lip to the invention by Barker of the pneumatic lever, predicting that it will revolutionize organ tone as surely and completely as did the latter organ mechanism, an estimate which is by no means so exaggerated as might be supposed. The leathered Diapason, indeed, is now attaining a zenith of popularity both in England and America.[3] A prominent German builder also, who, on the author's recommendation, made trial of it, was so struck with the refined quality of tone that he forthwith signified his intention of adopting the process. A few isolated and unsuccessful experimental attempts at improving the tone of the pipes by coating their lips with paper, parchment, felt, and kindred substances, have been recorded, but undoubtedly the credit of having been the first to perceive the value and inner significance of the process must be accorded to Mr. Robert Hope-Jones. It was only at the cost of considerable thought and labour that he was able to develop his crude and embryonic scientific theory into a process which bids fair to transform modern organ building. The names of Cavaille-Coll and George Willis, and of Hope-Jones, will be handed down to posterity as the authors of the most valuable improvements in the domains of reed-voicing and flue-voicing, respectively, which have been witnessed in the present era of organ building." The desire for power in Diapason tone first found expression in this country by the introduction into our larger organs of what was called a Stentorphone. This was a large metal Diapason of ordinary construction, voiced on heavy wind pressure. It was most harsh, unmusical and inartistic. It produced comparatively little foundation tone and a powerful chord of harmonics, many of them dissonant. In Germany, Weigle, of Stuttgart, introduced a similar stop, but actually exaggerated its want of refinement by making the mouth above the normal width. As knowledge of the Hope-Jones methods spreads, these coarse and unmusical stops disappear. He is without question right in urging that the chief aim in using heavy pressure should be to increase refinement, not power of tone. Sweet foundation tone produced from heavy wind pressure always possesses satisfactory power. He is also unquestionably right in his contention that when great nobility of foundation tone is required, Diapasons should not be unduly multiplied, but Tibias or large Flutes should be used behind them. Every epoch-making innovation raises adversaries.