EULER, Leonhard (1707-1738). Tentamen novae theoriae musicae, St. Petersburg: ex typographia Academiae Scientiarum, 1739, 4° (238 x 200mm.), FIRST EDITION, engraved vignette to title, 6 plates, all but one folding (old library stamps to title pasted over with paper labels, occasional spotting, else a good copy with wide margins), contemporary boards (part of backstrip torn away), sprinkled edges. [Dawson 2200]