Some time ago, in collaboration with Professor Read of St. Andrews, I was engaged in the transcription of some music contained in a book on Alchemy by one Michael Maier. The book, entitled Atalanta fugiens, was published near Frankfort in 1618. It contained fifty Discourses on Alchemy, each being preceded by a woodcut, an epigram in doubtful Latin verse and the first couplet of each of the latter set to music in canon; all the canons being written above, below, or around the same Canto Fermo. I had intended to speak of the music to-day, but as most of what I should have said has recently appeared in Professor Read's book Prelude to Chemistry, in which some of the canons are reproduced, I did not feel justified in repeating matter so recently issued in print. I have the book here and shall be glad to show it to anyone caring to see it at the close of the proceedings.