Abstract
In the Essay Review entitled “Unmasking a Galileo forgery” by Albert Van Helden on pp. 370–86 of our August issue, the caption to Figure 2 should read:
Fig. 2. Two forged copies of the Compasso. (above) Note the split line of type. (below) The coarse underlining hides the flaw in the second forged copy. Courtesy of Owen Gingerich.