. The pruning-book; a monograph of the pruning and training of plants as applied to American conditions. EFFECTS OF GIRDLING 117 passes down tlie stem is intercepted at the girdleand is there deposited as abnormal tissue. shows how a gir-dled pine tree lived, oi-inchesand piled up tissue above the barrier, IWiriiK ^^iilW until the roots werestarved and the tree. 90. Ruined by alabel wire. 3-1 inchesA girdled pine. The lowerpart had four annual circlesof wood and the upper parteight circles. died. All these remarks have a direct bearing onthe question of ringing, which we shall discussin
. The pruning-book; a monograph of the pruning and training of plants as applied to American conditions. EFFECTS OF GIRDLING 117 passes down tlie stem is intercepted at the girdleand is there deposited as abnormal tissue. shows how a gir-dled pine tree lived, oi-inchesand piled up tissue above the barrier, IWiriiK ^^iilW until the roots werestarved and the tree. 90. Ruined by alabel wire. 3-1 inchesA girdled pine. The lowerpart had four annual circlesof wood and the upper parteight circles. died. All these remarks have a direct bearing onthe question of ringing, which we shall discussin Chapters IV. and V. 118 THE HEALING OP WOUNDS The careful observer will often see the callusof wood wounds growing most rapidly from theupper side. In Fig. 88 the bark has grown downover the wound. In Fig. 75, the point of unionof the opposite sides of the callusring is at 1). This stub stood hori-zontal on the tree, and h was thelower side. The union of cion andstock sometimes acts as an obstruc-tion to the free downward movementof sap, causing a bulge on . old
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