48 DEEP-SEA SOUNDING. 



86° E. Constant lightning was observed on the eastern 

 horizon during the whole night. 



On the 31st sounded at 6 a.m. in 2683 fathoms, lat. 

 3° 47' 52" S., long. 99° 09' 57'' E. — brown mud; and 

 again in the afternoon in 3097 fathoms, lat. 4° 14' 29" S., ^ 

 long. 99° 50' 29'' E. — bluish-brown mud. No current. 

 Lightning was observed to the east and northeast all 

 night. 



On September ist at 6 a.m. a cast was taken in 1593 

 fathoms, lat. 4° 45' 31" S., long. 100° 50' 39" E. — light 

 brown ooze, sand, and shells ; and another in the after- 

 noon in 627 fathoms, lat. 5° 11' 54" S., long. 101° 39' 

 53'' E. — gray sand and shells. Engano Island was 

 sighted before dark. Current 0.37 knot an hour, setting 

 S. 67° E. 



On the 2d we took four casts as follows : at 6.30 a.m. 

 in 203 fathoms, lat. 5° 42' 18'' S., long. 102° 29' 46'' E. — 

 gray sand and shells; at 10.30 a.m. in 720 fathoms, lat. 

 5° 44' 29'' S., long. 102° 52' 49'' E. — blue clay mixed 

 with shells ; at 2.30 p.m. in 1087 fathoms, lat. 5° 46' 02" 

 S., long. 103° 29' 29'' E. — blue clay mixed with gray 

 sand and shells; and at 6.30 p.m. in 1207 fathoms, lat. 

 5° 51' 12'' S., long. 103° 35' 40" E. — gray sand and black 

 specks. 



Fine pumice-stone was spread over the surface of the 

 water. Thick disagreeable weather and heavy rains were 

 experienced at intervals throughout the day and night, 

 and after dark vivid lightnings flashed continually. 



The 3d of September began with fresh but variable 



