Upon the strings of the Violin depends in a great measure the successful regulation of the instrument. If, after the careful adjustment of bridge, sound-post, and bass-bar, strings are added which have not been selected with due care and regard to their relative proportion, the labour expended upon the important parts named is at once rendered useless. Frequently the strings are the objects least considered when the regulation of a Violin is attempted; but if this be the case, results anything but satisfactory ensue. It is, therefore, important that every Violinist should endeavour to make himself acquainted with the different varieties and powers of strings, that he may arrange his instrument with due facility. The remarkable conservatism attending the structural formation of the Violin exists more or less in the appliances necessary for the awakening of its dormant music. If we turn to its pegs, we find them of the same character as the peg of its far-removed ancestor, the monochord; and if we compare the Italian peg of the seventeenth century with a modern one, the chief difference lies in the latter being more gross and ugly. Upon turning to the bridge, we see that the bridge of to-day is almost identical with the bridge of Stradivari; and when we come to the strings of the Violin, we discover that we have added but little, if anything, to the store of information regarding them possessed by our forefathers. In, perhaps, the earliest book on the Lute, that of Adrian Le Roy, published in Paris in 1570, and translated into English in 1574,[1] we read: "I will not omit to give you to understand how to know strings." "It is needful to prove them between the hands in the manner set forth in the figures hereafter pictured, which show on the finger and to the eye the difference from the true with the false." The instructions here given, it will be seen, are those set forth by Louis Spohr in his "Violin School." In the famous musical work of Merseene, published in 1648, we find an interesting account of strings; he says they are of "metal, and the intestines of sheep." "The thicker chords of the great Viols and of Lutes are made of thirty or forty single intestines, and the best are made in Rome and some other cities in Italy. This superiority is owing to the air, the water, or the herbage on which the sheep of Italy feed." He adds that "chords may be made of silk, flax, or other material," but that "animal chords are far the best." The experience of upwards of two centuries has not shaken the soundness of Merseene's opinion of the superiority of gut strings over those made of silk and steel. Although strings of steel and silk are made to some extent on account of their durability and their fitness for warm climates, no Violinist familiar with the true quality of tone belonging to his instrument is likely to torture his ears with the sound of strings made with thread or iron. Continuing our inquiries