▁( 1 8 6 9 - 1 8 7 9 ) ▁George ▁Pl iny ▁Brown ▁( 1 8 7 9 - 1 8 8 5 ) ▁William ▁Wood ▁Par s ons ▁( 1 8 8 5 - 1 9 2 1 ), ▁LL . D ., ▁De P au w ▁University ▁ ▁Lin na eus ▁Ne al ▁H ines ▁( 1 9 2 1 - 1 9 3 3 ), ▁M . A ., ▁Corn ell ▁University ▁ ▁Ralph ▁No ble ▁T ire y ▁( 1 9 3 4 - 1 9 5 3 ), ▁ ▁M . A ., ▁Indiana ▁University ▁Dr . ▁R ale igh ▁Warren ▁Hol m sted t ▁( 1 9 5 3 - 1 9 6 5 ), ▁Ph . D ., ▁Columbia ▁Te ach ers ▁College , ▁Columbia ▁University ▁Dr . ▁Alan ▁Car son ▁Rank in ▁( 1 9 6 5 - 1 9 7 5 ), ▁D . S . Sc ., ▁Sy rac use ▁University ▁Dr . ▁Richard ▁George ▁Land ini ▁( 1 9 7 5 - 1 9 9 2 ), ▁Ph . D ., ▁University ▁of ▁Florida ▁Dr . ▁John ▁Moore ▁( 1 9 9 2 - 2 0 0 0 ), ▁Ph . D ., ▁Pennsylvania ▁State ▁University ▁Dr . ▁Lloyd ▁W . ▁Benjamin ▁III ▁( 2 0 0 0 - 2 0 0 8 ) ▁Ph . D ., ▁University ▁of ▁North ▁Carolina ▁Dr . ▁Daniel ▁J . ▁Brad ley ▁( 2 0 0 8 – 2 0 1 8 )