it must be admitted that the difficulties in the way of laying down any set of hard and fast rules for their regulation seem to be insuperable. The next important feature of the internal organism is the sound-post, which serves many purposes. It is the medium by which the vibratory powers of the instrument are set in motion; it gives support to the right side of the belly, it transmits vibrations, and regulates both the power and quality of tone. The terms used for this vital factor of a Violin on the Continent at once prove its importance. The Italians and French call it the "Soul," and the Germans the "Voice." If we accept the bass-bar as the nervous system of a Violin, the sound-post may be said to perform the functions of the heart with unerring regularity. The pulsations of sound are regulated by this admirable contrivance. If mellowness of quality be sought, a slight alteration of its position or form will produce a favourable change of singular extent; if intensity of tone be requisite, the sound-post is again the regulator. It must, of course, be understood that its power of changing the quality of the tone is limited in proportion to the constitutional powers of the instrument in each case. It is not pretended that a badly constructed instrument can be made a good one by means of this subtle regulator, any more than a naturally weak person can be made robust by diet and hygiene. The position of the sound-post is usually one-eighth to three-eighths of an inch behind the right foot of the bridge, the distance being variable according to the model of the instrument. If the Violin be high-built, the post requires to be nearer the bridge, that its action may be stronger; whilst flat-modelled instruments require that the post be set further away from the bridge. It is not possible to have any uniform arrangement of the sound-post in all instruments; as we have remarked before in reference to the bass-bar, the variations in the thickness, outline, model, &c., of the Violin are so frequent as to defy identity of treatment; uniformity has been sought for, but without success. The post can only be adjusted by a skilful workman, who either plays himself or has the advantage of having the various adjustments tested by a performer. The necessity of leaving this exceedingly delicate matter in practised hands cannot be too strongly impressed upon the amateur, for the damage done in consequence of want of skill is often irreparable. There are two methods of setting the sound-post in the instrument: the first fixes it in such a position as to place the grain of the post parallel with the grain of the belly; the second sets it crosswise.