4 ASTRONOMICAL OBSEnVATIONS MADE AT PANAMA. 



Results of (he foregoing Observations for the Latitude of Panama, Northwest Bastion, 



by Major W. H. Emory. 



Mean of all the observations, giving the same weight to each, 8° 57' 12".42. 



The means of each night's observations agree with each other much closer than the means of the observa- 

 tions of each pair, which shows that the errors in the declinations of the stars used are greater than the errors 

 of observation. 



The probable error in the mean of a single pair is ± 1".994, and the probable error in the mean of all 

 the pairs is ± 0".630. 



Giving to each pair a weight depending on the number of observations on the pair, we have for the most 

 probable determination of the latitude, 8° 57' 12". 15. 



Longitude of Panama, New Grenada, Station, Northtvest Bastion of the City Wall, 



by Major W. H. Emory. 



Dale, \<H9. 



March 27 



Phenomena observed. 



IiiDtrumciils used 

 for observing ihc Phenomena 



Emersion of Jupiter's Isl Telescope, by Mertz and 



for oblaininc: the Time at 

 Station. 



satellite observed with si- 

 dereal-lime chronometer 

 No. 420, by P. and F. 



April 14 Emersion of Jupiter's 2d 

 satellite observed with 

 mcan-solar-time chro- 

 nometer No. 1481. 



April 26 Emersion of Jupiler's Isl 

 satellite observed with si- 

 dereal-time chronometer 

 No. 420, by P. and F. 



Son, Munich, of 56 inch- 

 cs focal lengtli. 



Observations on east and 

 west stars with sextant 

 No. 1000, by T. and S 



April 30 



May 2 



May 4 



Culmination of moon'slPortable transit by Portable 23-inch transit- 



1st limb. 



Resnlls ol>- 

 taincd for 

 lyjngitnde. 



Remarks. 



Troughton & Simms of instrument, 

 London. Length of tel- described, 

 cscope, 23 inches. Aper- 

 ture of object-glass, 1| in. 



previously 



h. m. H. (E.) 



5 18 05.70 Observation satisfactory and 

 time well determined. 



_ (E-) 



5 18 07.26 Observation satisfactory and 

 time well determined. 



(VV.) 

 5 17 45.20 Observation satisfactory and 

 time well determined. 



(W.) 



5 17 42.04 "1 These observations arc the 

 less satisfactory from the 

 impossibility of keeping 

 the instrument up except 

 while observing. No me- 

 ridian-mark could be es- 



5 18 17.47 ( tablLshed, and the devia- 

 tion was usunlly large. 

 But high and low stars 

 were observed for devia. 



5 17 48.12 tion, and stars near the 

 moon for time. 



Result from a mean of six observations for the longitude of the northwest bastion of the city wall, 

 gh. Yi^. 57. _g3 _ 790 29> 24".45. 



