. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. FIG. 14. — Showing different types of guards for electri<', wires: 1, porcelain dowel guard; 2, porcelain wood guard; 3, wooden sleeve. It is, however, often better to allow this than to endure the erection of ugly poles; but proper insulation of the wires should be insisted on, although ordinary insulators have little effect on lightning discharges. The lagbolt system in common use for guying wires to trees is not the best method, for sooner or later the wire and bolt become imbedded in the tree and cause injury. More
. Bulletin - Massachusetts Agricultural Experiment Station. Agriculture. FIG. 14. — Showing different types of guards for electri<', wires: 1, porcelain dowel guard; 2, porcelain wood guard; 3, wooden sleeve. It is, however, often better to allow this than to endure the erection of ugly poles; but proper insulation of the wires should be insisted on, although ordinary insulators have little effect on lightning discharges. The lagbolt system in common use for guying wires to trees is not the best method, for sooner or later the wire and bolt become imbedded in the tree and cause injury. Moreover, a direct metal connection with a tree is objectionable, as it has in more than one instance proved. The block system is better, although it may not in all cases be free from objections. In no ease should a wire be allowed to pass tightly around a tre4 as it will girdle it in time. Wiien live wires come into contact with limbs, some type of insulator should be employed similar to that shown in 1, Fig. 14, of which there are various types, some being quite effective in preventing injury from low-voltage lines. The type shown. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Massachusetts Agricultural Experiment Station. Amherst, : Massachusetts Agricultural Experiment Station, 1907-1974
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