THE CARE OF STREET-TREES 135 



of long branches, and use the pole-hook in removing dead 

 branches of the ailantus and other brittle trees where it 

 would be too dangerous to reach them otherwise. 



"9. Examine your ladder before using it. 



' ' 10. Be sure of the strength of your branch before tying 

 an extension-ladder to it. 



"11. Do not slant the extension-ladder too much. 



"12. Always watch the upper end of your ladder. 



"13. Do not forget to use the 'danger sign' on streets 

 where falling branches are apt to injure careless passers-by. 



' ' 14. Always consult your foreman before taking up any 

 job where risk is involved." 



