The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte and came into use in the early twentieth century , encouraged by an editorial in `` American Engineer and Railroad Journal '' ( December 1900 ) .
The Whyte notation for classifying steam locomotives by wheel arrangement was devised by Frederick Methvan Whyte , and came into use in the early twentieth century encouraged by an editorial in `` American Engineer and Railroad Journal '' .