A switch is furnished so that when desired the stops and expression levers may be cut off and left to be operated by hand. The Hope-Jones Tracker Bar has no less than ten lines of holes--it is, of course, correspondingly wide. We look for a great development in the direction of organs played by mechanical means. The piano player has done a very great deal to popularize the pianoforte and in the same way it is believed that the automatic player will do a very great deal to popularize the organ. Many people who cannot play the organ will be induced to have them in their homes if they knew that they can operate them at any time desired, even in the absence of a skilled performer. We now give specifications of some of the most notable organs of the world, all of which have been built or rebuilt since the year 1888, and embody modern ideas in mechanism, wind pressures, and tonal resources. First in the writer's estimation comes the ORGAN IN ST. GEORGE'S HALL, LIVERPOOL, ENG. This noble instrument was built by Henry Willis to the specification of Dr. S. S. Wesley, by whom it was opened on the 29th and 30th of May, 1855. The writer made its acquaintance in 1866, when it was tuned on the unequal temperament system. In 1867 Mr. Best succeeded in getting it re-tuned in equal-temperament, several improvements were made, and the wind pressure on four of the reed stops on the Solo organ increased from 9 1/2 inches to 22 inches. In 1898 the organ was thoroughly rebuilt with tubular pneumatic action in place of the Barker levers. The compass of the manuals was changed from GG--a|3| to CC--c|4|,[1] five octaves, and the pedals were carried up to g--33 notes. A Swell to Choir coupler was added (!) and various changes made in the stops, the Vox Humana transferred from the Swell to the Solo organ, and two of the Solo wind-chests were enclosed in a Swell-box. We note that the Tubas are still left outside. The cast-iron pipes of the lowest octave of the 32-ft. Double Open Diapason on the Pedal organ were replaced by pipes of stout zinc, and four composition pedals added to control the Swell stops. [Illustration: Keyboards of Organ, in St. George's Hall, Liverpool. Two Rows of Stops at Left Omitted] The following is the specification of the organ as it now stands, in its revised form: FIRST MANUAL (CHOIR), 18 STOPS. FEET. FEET. Double Diapason 16 Gamba 4 Open Diapason 8 Twelfth 2 2/3 Clarabella 8 Fifteenth 2 Stopped Diapason 8 Flageolet 2 Dulciana 8 Sesquialtera, 3 ranks Viol da Gamba 8 Trumpet 8 Vox Angelica 8 Cremona 8 Principal 4 Orchestral Oboe 8 Harmonic Flute 4 Clarion 4