TY  - GEN
AU  - Walker, Ralph
TI  - A  Treatise on the magnet, or: natural lodestone, with tables of the variation of the magnetic needle, for all latitudes and longitudes, observed at different times in the Atlantic, Indian, and Pacific Oceans, by the following celebrated navigators
U1  - 538 Ja W183 
PY  - 1798///
CY  - London
PB  - Printed for M. Allen...and T. Wallis...
N1  - Tables edition is the same as that of 1794 except for the change of title
ER  -