520 



GENERAL SCIENCE 



" The ' unloaded ' gun frequently kills." 



" Trolley and railroad tracks are the giants' sidewalks. You 

 have your own." 



" A wire is a dangerous thing; let it alone." 



" Gas brackets are not clothes hooks." 



" Wait for the fire to kindle, or rebuild it. Don't hurry it with 

 oil." 



" Stolen rides often cost too much." 



" Play in safe places only." 



" Let cars, automobiles, motorcycles, and wagons go past first." 



" Work, play, travel; but always think 



'SAFETY FIRST." 



FIG. 395. Mutilated; inefficient. The best safety device is a careful man. 



QUESTIONS 



1. Why is roller skating dangerous in a street on which there is 

 considerable traffic? 



2. Why is it best never to climb poles on which there are wires 

 for the transmission of electric currents? 



3. If standing in a wagon or car why should one be careful to 

 hold on to some part of the vehicle when it is about to start? 



