WALKER, RALPH |
Jamaica; England, 1749-1824, NIM |
Azimuth Compass = NMM; Universal Ring Sundial, mounted over a Compass = PEA. |
invented a tide calculator that was made by George Adams 2, an example is at the NMM. |
Jamaica; London. |
Taylor 2(782); J.A. Bennett 2; Dewhirst; Bedini 8; Brewington 1; RSW. |
|
|
|
|
|
|