Moderate breeze from SE. by S.; rather hazy, but the horizon sharp and distinct. No. 50. OFF THE PEI-HO, YELLOW SEA. _August 8, 1816._--6.15. A.M. Index uppermost. Instrument inverted. A + 10'. 20" B - 12'. 50" 10 . 18 12 . 45 10 . 35 13 . 00 ---------- ---------- Mean 10 . 24, 3 Mean 12 . 51.7 B. Mean + 10 . 24.3 A. ---------- 4) 23 . 16 5 . 49 Dip. 3 . 50 Tabular. 1 . 59 Difference + ---------- Height of the eye, 15 feet, 3 inches. Parts of the horizon observed, NNE. and SSW. clear of the land. Depth of the sea, 26 feet. Barometer 29 . 65 inches. Thermometer { Air 69-1/2º { Sea 78º Wind NNW. moderate. Latitude - 38º. 50' north. Longitude - 118º. 00' east. _Mem._--The top of the fort at the mouth of the river, is just visible at 30 feet from the surface of the water. No. 53. OFF THE PEI-HO, YELLOW SEA. _August 10, 1816._--6.10. A.M. Index uppermost. Instrument inverted A + 13'. 55" B - 7'. 30" 13 . 50 7 . 15 13 . 45 7 . 25 ------- --------- Mean 13 . 50 Mean 7 . 23.3 B. --------- Mean + 13 . 50 A. --------- 4) 21 . 13.3 5 . 18.3 Dip. 2 . 20 Tabular. 2 . 58 Difference + Height of the eye, 5 feet, 6 inches. Depth of the water, 5 feet. Parts of the horizon observed, N. by E. and S. by W. just clear of the land. Barometer 29 . 69 inches. } On board His Majesty's ship Lyra, Thermometer { Air 75º } distant three or four miles. { Sea 77º } Wind WNW. About one mile from the fort of Tung-coo, at the entrance of the Pei-ho river. _Note._--Instrument readjusted. No. 58. OFF THE PEI-HO, YELLOW SEA. _August 10, 1816._--2 P.M. Index uppermost. Instrument inverted.