34 



REPORT ON 



The Powhattan fired a salute, and, from the mean of seven observations, the 

 interval between the flash and report, noted at B, was 6.55 seconds. External 

 thermometer 86. Hence the distance from B to D was 7526 feet. 



Distance from B to M = 200 feet. 



Azimuth from M to A = N. 75 38' E. 



Angle A MB = 128 57'. 



From these data we find the 'distances between the several points as follows : 



BE = 1443 feet. 



CF = 3568 " 



Angle BAM=o 28' 



Azimuth from Mto A = 

 " " B to A = 



Angle AMB=* 128 57' 



Angle AB M=f s o 35' 



N. 75 38' E. 

 N. 76 6 E. 



Azimuth from B to E = S. 8 43' E. 

 " B to ^ = 8.43 26 W. 



Assuming the position of M to be 



Lat. 3 

 Long. 2 h 

 we get finally 



43' 59". o S. 

 34 m 6'.oo W. 



For convenience of reference the results of the observations contained in this 

 section, together with the chronometer comparisons made during the cruise, are 

 here collected and appended. 



Observed Latitudes. 



