Giuseppe Tartini - Lettere e documenti / Pisma in dokumenti / Letters and Documents - Volume / Knjiga / Volume II

365 LETTERS wrote to you in the other letter of mine; but as proof is now easy, Your Reverence should make an effort to find there two oboe players (average ones shall be sufficient, there is no need for them to be excellent) and establish the same trial for your own ears, instructing them to play with force, to sustain the note, and to use easy chords for perfect intonation, that is to say the major third, which makes the good chord appear more decisively, or the fourth in which it is easier to detect true or false intonation. After examining these two chords, you can then proceed with others at your pleasure. If then Your Reverence tells me that this was never heard and is not heard in the organ, I answer you that the position of the pipes, the covering and other circumstances (it will be possible to examine them in due time) may constitute a physical impediment to such an effect. It is sufficient for me to have predicted to you that if there is a third sound in wind instruments, it will be identical to that of bowed instruments. Thus it was found in the trial carried out, and thus it will be found eternally in all the instruments that are capable of it. When Your Reverence has carried out the trial, I ask you to reflect carefully (as those mentioned above have done) on the way in which this third sound is heard. It shall be impossible for you not to likewise discover the physical way in which it is generated, and for Signor Dottor Balbi not to discover the demonstrative way. I submit to you my regards, and I remain Your Reverence’s most humble, devoted and obliged servant Giuseppe Tartini Padua, 23 June 1752 99. Tartini to G.B. Martini I could not answer you in the last post as I have been, and partly still am, with my pains, and I call them my own because I have had them since my birth. I tell you now that I am most comforted to hear that the Most Illustrious Signor Dottor Balbi is assisting in the examination. May he do so until the end, hoping that you shall all feel gratified by the effort made. Then, to answer with precision to what is asked to me, namely the physical explanation of the third sound so as to be able to adapt it to linear figures, I shall say that I do not owe this explanation in any way, as it is unnecessary for the demonstration of my main proposition, which is the squaring; and this is in general. I shall say something further, that none of the particular propositions is necessary; and this is in particular. I shall demonstrate my assertion. My method consists in comparing square and circle. In