MARS AND VENUS, 



U. S. NAVAL OBSEKVATORY, WASHINGTON, 



LIEUT. M. F. MAURY, LLD., SUPERINTENDENT. 



MICROMETRICAL MEASURES 



WITH THE 



FOURTEEN FEET EQUATORIAL 



THE OPPOSITIONS OF MAES AND INFERIOR CON JUNCTIONS OF 

 VENUS IN THE YEARS 18491852. 



