Street Trees. 345 



This Bulletin sets forth some of the following matters: 



Injuries arising from gas escaping in the soil are widespread and may be serious. 

 When the injury is severe there is Httle hope of saving the trees. In the early 

 stages of such injury it is well to break up the hard surface soil and perhaps to 

 open a ditch in order to accelerate the aeration. Pages 453-454. 



The injury from electric currents carried by overhead wires has come to be a 

 subject of considerable importance. The electric currents may injure or kill the 

 trees. Every effort should be taken to safeguard the trees against such injuries. 

 Pages 454-456. 



The public and the owners of trees should keep a lookout to see that trees are 

 not injured by careless pruning on the part of linemen. Suggestions are given 

 as to ordinances that may control this evil. Pages 456-458. 



Tree owners are warned against persons who may represent themselves as 

 competent to prune trees. Pruners should be employed only when their merits 

 are known, or when they come with reliable recommendations. Pages 459-460. 



Attention is called to the injury that arises from various kinds of construction 

 work, carelessness of contractors, and the like, together with suggestions as to 

 remedies. Pages 461-462. 



What to do when it is necessary to fill about trees is explained on page 462. 



The danger from wind and ice storms may be lessened by the proper choice of 

 kinds of trees, and also by careful pruning and removal of all dead wood. Pages 

 462-463. 



Winter-killing may be avoided in part by proper choice of the kinds of trees. 

 Suggestions are given for treating winter-injured trees. Pages 463-464; 471. 



Attention is called to injuries from the bites of horses and from wagon wheels. 

 Remedy lies largely in stimulating public sentiment and in enforcing ordinances. 

 Pages 464-465. 



In city streets the root systems are likely to be starved for lack of food and 

 water. Suggestions are made for gratings about trees that will let the water in, 

 and instructions are given for the removal of poor soil and filling in with good soil. 

 Pages 465-467. 



Smoke and gas inay injure trees. The remedy is to choose trees that are likely 

 to be least affected and also to enforce ordinances. Page 468. 



The over-crowding and improper placing of trees results in very bad effects. 

 There should be some general oversight over such matters. Pages 468-469. 



Attention is called to the necessity of removing wire labels to avoid injury to 

 trees, and directions are given for bridge-grafting trees that have been inji-red. 

 Page 469. 



Means of providing support for newly planted trees are outlined on pages 469-470. 



Various kinds of guards for protecting trees against horses and wagons are 

 described on pages 470-471. 



Gratings or grills to be placed around trees in paved streets to allow the water 

 to enter the soil, are described on page 471. 



The ways of pruning trees and the objects to be secured in the operation are 

 detailed on pages 472-476. 



The protecting and dressing of wounds is described on pages 476-477. 



Discussion of "tree surgery," or the dressing of large wounds, injuries, and 

 decayed places, is described on pages 478-480. All decayed parts are carefully 

 removed and the cavities filled with cement. 



The bolting and chaining of trees to save weak or broken parts Is described 

 on pages 480-483. 



The remainder of the Bulletin (pages 483-489) is devoted to a discussion of some 

 of the main points in the municipal control of shade crees. The same ideas may 

 be extended, with necessary modifications, to the rural districts. 



