Boileau, John Theophilus. **E 5012.91 A new and complete set of traverse tables, shewing
the differences of latitude; with a table of the length of each degree of latitude and correspond-= ing degree of longitude from the equator to the poles, with other tables. Londen: W. H. Allen. 187... xliv,..-.3 folded plates. 8°.
- Tables. Math.-Latitude.=-Longitude. a