PROCEEDINGS OF THE POLYTECHNIC ASSOCIATION. 529 



lever is an improvement on the forte stop, but it is placed in an awkward 

 position, and cannot be used with ease and effect by a gentleman, much 

 less by a lady. 



The several automatic devices being operated by the contraction and 

 expansion of the bellows, cannot be under complete control of the player, 

 inasmuch as when the tone is loudest, the bellows is contracted to its 

 utmost, and in order to produce the softest tone, sufficient time must elapse 

 for the bellows to fill, and vice versa. This arrangement differs from the 

 "forte stop" in this respect; it is all gradation, with no power to make a 

 quick transition from loud to soft, or soft to loud. The utter impossibility 

 of phiying music as it is written, by means of this latter contrivance, is 

 obvious. 



These defects have hitherto deterred us from making instruments with 

 double bellows pedals, until such time as we could make an improvement 

 wliich would overcome the difficulty. 



This we have thoroughly and satisfactorily accomplished in the "com- 

 bination swell," which is so placed and combined with the bellows pedal 

 as to rest lightly against the outside of the left foot, and may be operated 

 with perfect ease while in the act of supplying the bellows It will be 

 readily seen that by means of this invention the crescendo and diminuendo 

 may be produced at will, perfect and complete, even with one foot (the bel- 

 lows having great capacity) ; the wind can be easily supplied and the swell 

 operated at the same time. 



The Parlor Organ has two sets of reeds, two stops (Diapason and Prin- 

 cipal), and contains all of our best inventions, consisting in part of our 

 "double exhaust bellows," "pneumatic stop," "combination swell," 

 "improved action," &c., &c. The tones are clear and sweet, and when 

 swelled to their fullest extent acquire a full, round, organ-like character. 



The Church Organ Harmonium. 



These instruments are adapted to churches and large public rooms. They 

 contain a variety of stops. For instance, of those now illustrated. No. 2 

 has four sets of reeds and ten stops, viz: diapason, principal, bassoon, 

 bourdon, tremolo, flute, principal, hautboy, clarionet, grand organ. No. 4 

 has two banks of keys, five sets of reeds, twelve stops; a' so one-half and 

 two octaves of pedal base. The stops are arranged in a row above the 

 key-board, within convenient reach of the performer, and are so named and 

 numbered that the various combinations may be quickly made and changed. 

 The Grand Organ stop commands the full power of t le instrument, when 

 drawn, and on being closed, the original combination is restored. As a 

 new feature in this class of instrument, we have introduced the " tremolo" 

 stop for solos and interludes. 



These organs contain the patent pneumatic stop or mute, which always 

 insures a perfect closing of the stops; also the new action, which simpli- 

 fies the internal mechanism, so that the reeds, valves, &c., may be easily 

 and quickly removed. 



Is pleasing in its architectural proportions, and in appearance like an 

 upright or "Boudoir" pianoforte, made of solid kiln-dried black walnut, 



1_Am. Inst ] B.* 



