He held this position for three years before deciding to open a private school in Baltimore , which was devoted to the study of classics and mathematics .
In 1847 , Baird became a professor of mathematics at Marshall College in Mercersburg , Pennsylvania .
Baird held this position for three years before deciding to open a private school in Baltimore , which was devoted to the study of classics and mathematics .
In 1847 , Baird became a professor of mathematics at Marshall College in Mercersburg , Pennsylvania .