40 



MEMOIRS OF THE NATIONAL ACADEMY OF SCIENCES. 



OBSERVATIONS FOR TIME. 



fHouohihi, May :!0, p. m. Double altitudes of the sun. W. Upton, observer. Cbroiionieter, Hutton, 202. S.J. 



Brown, recorder.] 

 I. INDEX CORRECTION. 



II. 



Before observation. After observation. 



Off arc. Ou arc. I Off arc. On arc. 



o ' /. ! / // 



359 22 I 25 30 



10 I .SO 



5 i 20 



Corr. + 6' 14". 



Mean + 6' 19". 



359 22 I 25 10 

 10 



- - - - I 15 



Corr. + 6' 23". 



CHRONOMETER COMPARISONS. 



1340. 202. 



h. m. s. h. m. s. 

 1 45 30 = 8 8 50 

 3 35 40 = 9 59 18 



REDUCTION BY METHOD OF SINGLE ALTITUDES. 



[W. LTpTON, computer.] 



h. m. 8. 

 202 slow 10 1 29.5 Greenwich sidereal time. 

 1340 fast 8 2. 4 Greenwich mean time. 



[Honolulu, June 1, a. ra. Double altitudes of the sun. W. Upton, observer. Chronometer, Hutton, 202. Mrs. W. 



Upton, recorder.] 



I. 



II. 



INDEX CORRECTION. 



CHRONOMETER COM- 

 PARISONS. 



1340. 202. 



h. m. 8. h. m. s. 

 5 14 15 = 23 44 2 

 7 5 10 = 1 35 15 



Somewhat disturbed by clouds and jarring of the mercury from passing carriages. 



