TREES 



1845 



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2564. Abies venusta. one of the California firs. 



assistance liyiiointing out how soniL- of the mistakes may 

 be avoided.' The unsatisfactory n-sults of stri-et-i>laut- 

 ing, so often met with, can generally l>e traced to one 

 or all of three causes : 



1. Selection of unsuitable species. 



-. The TULsing of several species on the same idii^ck 

 and even in front of the same lot. 



3. Crowding the trees. 



This last-mentioned source of trouhle is perhaps-.tlic 

 cause of more failure than the tir-t. Wh.-u trees are 



once growing, few persons have the heart to thin out 

 the spi'cimeiis to the proper distance apart: finally a 

 newcoiih-r, without personal feeling in the matter and 

 noting "niv that there is too much shade and toci little 

 light."cnts",l..wn the whole row and a gap is left in what 

 inav have hem a fairly uniform hI'Mjk. Spreading 

 avi nue tri-es ,if large size should not staml closer than 

 r.O ft. aiiart: snmllrr trees, on narr>over streets should 

 iiave JO ,ir at the very least :!0 ft., tmless they are slen- 



1 . _ , ) l.-i;,.,... .-.,. TT-.i .a , in .vf/-,ii i ., .^ n-r.,,! 



der spri'ie 



r washingtoiiias, when 



