The singer who practises with the piano has no safe principle by which he can measure the height of his tones with any exactness. But persons of good musical talent, made aware of this disadvantage by a competent teacher, and practising accordingly, can nevertheless overcome this difficulty caused by our present method of tuning, and learn to sing correctly and purely. Until the seventeenth century, singers were drilled by the monochord, for which _Zarlino_, in the middle of the sixteenth century, re-introduced the correct, natural tuning. The drilling of singers was conducted at that time with a care of which we have now no idea. The church music of the fifteenth and sixteenth centuries is arranged upon the purest consonant chords, depending upon this for its whole effect, which would naturally be injured if not executed with perfect purity. Our opera singers now-a-days are seldom able to sing without accompaniment a composition for several voices so purely that its whole beauty is felt; the accord almost always sounds sharp and somewhat uncertain, and therefore cannot satisfy a really musical ear. SPEECH The vowels and consonants are, in speaking, produced by certain noises (_Geräusche_), which in singing sound together with the tone. These sounds are produced by local diminutions of the cavity of the mouth, or by the opening or closing of the lips and teeth, as well as by movements of the tip of the tongue, &c., while a single pulse of the air passes through the tolerably wide open glottis and through the cavity of the mouth without regular vibrations. For the air rushes more directly out of the mouth in speaking than in singing. Of this we may be easily convinced by holding a feather before the mouth; it will show far more motion in speaking than in correct singing. If, in speaking, people would take pains to form the vowels in the front of the mouth--a habit so necessary in singing, and which is easily acquired by practice--our common speech would be much more melodious, far-sounding, and less strained. We see the truth of this when we hear words called out from a height and from a distance; the different consonants then mostly disappear, excepting the _m_ and _n_, which are formed mostly in the front of the mouth. The vowels, on the other hand, are more or less plainly heard, according to the places in the mouth where they are formed. Certain it is that for the beauty of our common speech, the resonance of the cavity of the mouth peculiar to each vowel may be rendered available. A singing tone in speaking is very disagreeable. Every one who is not used to it, finds the singing dialect of Saxony in the highest degree offensive and unpleasant. Nevertheless, a more attentive observation soon teaches us that behind the noise which characterizes the several sounds in language, a timbre is heard similar to the tone in singing, and in various instances there occur regular musical intervals, as at the end of a sentence or in the special