PRACTICAL MEASUREMENTS 

 JUDGING DISTANCE AND SURFACE 



30. Every one should be so familiar with the units of 

 measure that he can measure distance, surface, and volume 

 fairly accurately with the eye. 



EXERCISE 



1. Lay off a square yard on the wall or blackboard with 

 colored crayon. Put it in a conspicuous place and do not 

 erase. 



2 . In one corner of the square yard lay off a square foot. 



3. Make an estimate of the number of square yards in 

 the schoolroom floor ; then measure and determine the exact 

 number. 



4. Make an estimate of the number of square feet in the 

 blackboard ; then measure and determine the exact number. 



5. How many square feet in the top of your desk ? 



6. How many square feet in the floor ? 



7 . How many square yards in the wall ? 



8. Measure a rod on the school yard and mark with two 

 firmly set stones or stakes. 



9. Lay off 300 ft. by accurate measurement, set up stakes 

 at each end, and walk this distance several times, counting 

 the number of steps taken each time. From this determine 

 the length in inches of your average step. 



10. By stepping, estimate a quarter of a mile. 



30 



