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- Ulmus americana, [154].
- Ulmus racemosa, [152].
- Ulmus thomasi, [152].
- Utilization of forests, [271]-277.
- Walnut, Black, [116], [300].
- Walnut, White, [114].
- Warping, [42], [47].
- Waste, Avoidance of, [274].
- Waste in lumbering, [263].
- Water, [41], [42], [226],
[231].
- Weeds, Forest, [225].
- Weight of wood, [41], [49]-51.
- Whitewood, [158].
- Wilderness, Conquest of, [258].
- Willow, Black, [112].
- Wind, [229], [252], [253].
- Windfalls, [229].
- Wood, Diffuse-porous, [23], [30], [300]-303.
- Wood, Non-porous, [24]-26, [58]-111, [294]-296.
- Wood, Primary, [17].
- Wood, Properties of, Chap. II., [41]-56.
- Wood, Ring-porous, [23], [29], [296]-299.
- Wood, secondary, [17].
- Wood, Spring, [20], [21], [24],
[30], [32], [44], [53],
[54], [291].
- Wood, Structure of, [9]-40.
- Wood, summer, [20], [21], [24],
[30], [32], [44], [53],
[54], [291].
- Wood borers, [243].
- Wood cells. See Cells.
- Wood. See Sap-wood, Heart wood.
- Wood dyes, [18].
- Wood fiber, [28].
- Woods, Color of, [17], [18], [290].
- Woods, The distinguishing of, [289]-303.
- Working, [47].
- Worm-holes, [243].
- Worms, carpenter, [245].
- Worms, Timber, [244].
- Wound parasites, [234].