Schumacher 's nephew , Christian Andreas Schumacher ( 1810 -- 1854 ) , was associated with the geodetic survey of Denmark from 1833 to 1838 .
Afterwards ( 1844 -- 1845 ) improved the observatory at Pulkowa .
Schumacher 's nephew , Christian Andreas Schumacher ( 1810 -- 1854 ) , was associated with the geodetic survey of Denmark from 1833 to 1838 , and afterwards ( 1844 -- 1845 ) improved the observatory at Pulkowa .