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EVERYDAY SCIENCE 



The reading on the gas-meter shown in Figure 19 is 79,500 cubic 

 feet. The hand in the first circle presents a fine example of a 

 doubtful reading. It looks as if it might be exactly 80,000 cubic 

 feet. But since the hand in the 2d circle has not quite reached 



FEUT 



FIGURE 19. DIAL OF GAS-METER. 



zero, the first hand must be read 7 and the second hand 9 giving 

 79 instead of 80 thousand. 



The circle marked "two feet" is for test purposes, as was ex- 

 plained in the case of the water-meter. 



PROJECT XXXIII. Learning Weather Lore That a Boy Scout or 

 Camp Fire Girl Ought to Know, Chapter VIII. 



Careful observation of sky and clouds for centuries, of air condi- 

 tions, and of the behavior of birds, barnyard fowls, and insects, 

 has resulted in a wealth of weather maxims that are pretty reliable. 

 Of course there are many bits of superstition that pass as weather 

 lore that are utterly unreliable. The task for an observer is to 

 sort out weather wisdom from silly superstitions. The most useful 

 and interesting books for the amateur weather forecaster are : 



"Official Handbook, Boy Scouts of America." 



"Reading the Weather," T. M. Longstreth. Outing Publishing 

 Co. 



