Under the name of Sforzando Coupler, the mechanism of which is described and illustrated in Stainer's Dictionary, a device was formerly found in some organs by which the keys of the Swell were caused to act upon the keys of the Great. The coupler being brought on and off by a pedal, sforzando effects could be produced, or the first beat in cadi measure strongly accented in the style of the orchestration of the great masters. Hope-Jones in his pioneer organ at St. John's Church, Birkenhead, England, provided a pedal which brought the Tuba on the Great organ. The pedal was thrown back by a spring on being released from the pressure of the foot. Some fine effects could be produced by this, but of course the whole keyboard was affected and only chords could be played. Various complicated devices to bring out a melody have been invented from time to time by various builders, but all have been superseded by the invention of the "Double Touch." On a keyboard provided with this device, extra pressure of the fingers causes the keys struck to fall an additional eighth inch (through a spring giving way), bringing the stops drawn on another manual into play. If playing on the Swell organ, the Choir stops will sound as well when the keys are struck with extra firmness; if playing on the Choir the Swell stops sound; and if playing on the Great the Double Touch usually brings on the Tuba or Trumpet. It is thus possible to play a hymn tune in four parts on the Swell and bring out the melody on the Choir Clarinet; to play on the Choir and bring out the melody on the Swell Vox Humana or Cornopean; or to play a fugue with the full power of the Great organ (except the Trumpet) and bring out the subject of the fugue every time it enters, whether in the soprano voice, the alto, tenor, or bass. In the latest Hope-Jones organs arrangements are made for drawing many of the individual stops on the second touch, independently of the couplers. BALANCED SWELL PEDAL At the commencement of the period of which we are treating (some fifty years ago) the Swell shutters of almost all organs were made to fall shut of their own weight, or by means of a spring. The organist might leave his Swell-box shut or, by means of a catch on the pedal, hitch it full open. When, however, he wanted the shutters in any intermediate position, he had to keep his foot on the pedal in order to prevent its closing. The introduction of the balanced Swell pedal (Walcker, 1863) has greatly increased the tonal resources of the organ. It is used almost universally in this country, but strangely enough the country in which the Swell-box was invented (England, 1712) lags behind, and even to-day largely adheres to the old forms of spring pedal.