1812-1889 1825-1864 1864-1945 1872-1948 agriculture andrew basilwilson biography britishcolumbia businessmen cavalryoperations confederatestatesofamerica contibutionsinphysicsmach duke economicaspects economicconditions ernst friendsandassociatesmorgan generals greatplains harrygrey hill history historycanadianpacificrailwaycompany historykettlevalleyrailway interracialmarriage johnhunt kentucky lawyers legislators louisville louiswarren marthagrey mcculloch metaphysics psychophysics railroads southafrica stamford