Cyfyngwch eich canlyniadau yn ôl:
- Pob un
- Myddelton, William, Inner Temple., 2 canlyniadau
- Pennant, Thomas, 1726-1798 -- Correspondence, 1 canlyniadau
- Pughe, W. Owen (William Owen), 1759-1835, 1 canlyniadau
- Pennant, David, 1763-1841, 1 canlyniadau
- Mostyn, Edward Pryce Lloyd, Baron, 1768-1854, 1 canlyniadau
- Lloyd, Phoebe., 1 canlyniadau
- Society of Antiquaries of London., 1 canlyniadau
- Herschel, William, 1738-1822, 1 canlyniadau
- Stonefield, John Campbell, Lord, ca. 1733-1801 -- Death and burial., 1 canlyniadau
- Farey, John, 1766-1826., 1 canlyniadau
- Pob un
- Copper mines and mining -- Wales -- Llandudno., 1 canlyniadau
- Geology -- Scotland -- Western Isles., 1 canlyniadau
- Volcanism., 1 canlyniadau
- Beacons -- Wales -- Conwy., 1 canlyniadau
- Astronomy -- Experiments., 1 canlyniadau
- Solar eclipses., 1 canlyniadau
- Telescopes -- England., 1 canlyniadau
- Electricity in medicine -- History -- 19th century., 1 canlyniadau
- Mines and mineral resources -- Ireland., 1 canlyniadau
- Barley industry -- Great Britain., 1 canlyniadau
