33d CONGRESS, ) HOUSE OF REPRESENTATIVES. C Ex. Doc. 



1st Session. \ I No. 121. 



THE 



U, S. NAVAL ASTRONOMICAL EXPEDITION 



THE SOUTHERN HEMISPHERE, 



THE YEARS 1849-'50-'51- 1 52 



Lieut. ARCHIBALD MACK.AE, ) 



Master S. LEDYAKD PHELPS, > Assistants. 



Captain's Clerk E. R. SMITH, ) 



VOLUME III. 



OBSERVATIONS TO DETERMINE THE SOLAR PARALLAX. 



BY LIEUT. J. M. GILLISS, LL.D. 



SUPERINTENDENT. 



WASHINGTON: 



A. O. P. NICHOLSON, PRINTER. 

 MDCCCLVI. 



