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

364 to the mathematician, and not to the musician. So we must conclude: either Signor Dottor Balbi really enters into it or he doesn’t. If he enters, may God be thanked; if he doesn’t, I am sorry, but I must know it, and Your Reverence must answer me in this regard without hiding it. If he does not enter, and Your Reverence wants to do me a courteous favour, find a convenient person, as I wrote in the other letter of mine, that is to say either assigned by the Most Illustrious Signor Dottor Balbi, or chosen by Your Reverence. If then not even such a person can be found, any examination is superfluous, and time has been thrown away for nothing. I then heartily beg Your Reverence to relieve me of this state with a sincere exposition of the fact, as having to deal with me, you are dealing with a trustworthy person. I submit myself to Your Reverence, and I remain as ever Your Reverence’s most humble, devoted and obliged servant Giuseppe Tartini Padua, 16 June 1752 98. Tartini to G.B. Martini I am obliged to pass on the news that in the rooms of our Padre Maestro Vallotti, the trial of the third sound was carried out, with two oboes played, one by our famous Signor Bissoli and the other by a student of his. The third sound is detected a lot better than from two violins, and it is the very same as that resulting from two violins. Thus shall it be, therefore, both for trumpets and hunting horns, if one will take the trouble of carrying out the trial. Your Reverence and the most revered Signor Dottor Balbi will then remain entirely persuaded of its physical universality, as one must necessarily remain persuaded of its demonstrative universality, which I have submitted to your attention. Furthermore I tell you that the similar effect which took place with the two oboes causes one to experience first-hand the physical way in which this third sound is produced by two volumes of air. In fact – for present at the aforementioned trial, in addition to Padre Maestro Vallotti, who is per se a man learned in subjects other than music, were two other most learned men, one of whom being the canon Rochettino, a native of Bologna, who is presently living in Ravenna and is here by chance, and the other a noble, but most learned person, from these lands of ours – it was concluded (with everybody in agreement) that nothing else could explain the physical way this third sound is produced, if not the exact same explanation I had given to all of them. Furthermore, besides the physical certainty, I have the demonstrative certainty, as I