Συμποσιακῶν προβλημάτων βιβλία

Question IX. WHAT CAUSE PRODUCETH ACCORD? AND ALSO, WHY, WHEN TWO ACCORDANT STRINGS ARE TOUCHED TOGETHER, IS THE MELODY ASCRIBED TO THE BASE?

Question X. WHY, WHEN THE ECLIPTIC PERIODS OF THE SUN AND THE MOON ARE EQUAL IN NUMBER, THERE ARE MORE ECLIPSES OF THE MOON THAN OF THE SUN.

Question XI. THAT WE CONTINUE NOT ALWAYS ONE AND THE SAME, IN REGARD OF THE DAILY DEFLUX OF OUR SUBSTANCE.

Question XII. WHETHER OF THE TWAIN IS MORE PROBABLE, THAT THE NUMBER OF THE STAR IS EVEN OR ODD?