Fir, Alpine, [16], [20], [27], [32], [40], [42], [57]

amabilis, [16], [20], [27], [57]

Douglas, [13], [16], [20], [27], [32], [36], [40], [42], [48], [55], [57], [124], [140], [141], [142], [143], [144]

white, [9], [16], [20], [27], [32], [40], [42], [57]

Flexibility, [5], [37]

Flexure, [4], [12], [60]

Formulæ, [98], [102], [104], [107], [110], [114], [123]

Frost splits, [62]-64

Fungi 59, [68]-70, [75]

Grain, cross, [8], [59]-61