Measures to secure a patent for the above have been taken by Edmund E. Shepardson and Edwin Lucas, of New Bedford, Mass. By the arrangement of the instrument in this improvement, the vibrating part of the reed can ; be lengthened or shortened at pleasure, and I therefore any required tone may be easily ob-' tained. To attain this desideratum, a tube or pipe, placed on the upper board of the bellows, is capable of moving lengthwise, and by this movement regulates the vibration ot the reed, which fits in a slot in the under side of the tube. When the performer moves the tube it affects two clamps, which then approach to or recede from the ends of the reed.