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_ AA A A _ A A A AA _ AA AA AAAA Berkshire County Boston Edison bracing cable cause cavities civilian completed conﬂicts creosote crotch cut elm wood damage decay defects diseases and insect Dutch elm disease Electric light elm bark beetle evergreens extensive fertilizer ﬁre alarm ﬁrst ﬂood foliage Forest frost crack fungus grafting guard for telephone healthy holes hurricane of 1938 insect pests limbs maple Massachusetts State College materials method municipal tree necessary Poison ivy Poison sumac practice prevent removal result S. J. Ewer scions screw rod shade trees shellac shown in ﬁgure soil sometimes Speciﬁc sterilizing stump sufﬁcient Sugar Maple tissue treated treatment tree casualties tree injuries tree programs TREE PROTECTION tree troubles tree warden trunk washers and nuts weakened trees wire,using agencies wood,destroying fungi woody wound dressing