He was appointed professor of natural history at the Royal Agricultural College , Cirencester in 1870 .
Assistant to Professor John Hutton Balfour at Edinburgh , McNab studied in Germany before graduating MD at Edinburgh University ( 1866 ) .
McNab was appointed professor of natural history at the Royal Agricultural College , Cirencester in 1870 .
Assistant to Professor John Hutton Balfour at Edinburgh , McNab studied in Germany before graduating MD at Edinburgh University ( 1866 ) .