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THE POPULAR SCIENCE MONTHLY
The "Carnegie."
amounts running up to one degree and a half, i. e., the compass was found to point farther to the west of north than indicated by the charts. On the portion of the trip from St. John's to Falmouth, an error in the reverse direction was revealed, showing that the compass did not, in general, point as far west as given by the mariner's charts—the errors almost reached a degree.
The effect of these chart errors, on account of their systematic and peculiar run, is to set both inward-and outward-bound vessels towards Sable Island or Cape Race whenever sole reliance must be placed upon the compass, as is the case when no sun or
