A YEAR IN SCIENCE 17 



water continue to run into the bottle ? Open the clamp. 

 What happened? How do you account for the results? 



Exercise 2. Comparison of English and Metric 

 Systems.* 



Object: To compare the English and metric systems. 



Apparatus 



Compass English weights 



Metric rule Quart measure 



English rule Liter measure 



Metric weights Centigrade thermometer. 



Directions: A. Comparison of the English and 

 metric units of length. 



Use a compass with sharp steel points, a metric rule, 

 and an English rule. Accurately get the space of an 

 inch with the compass. Place the compass on one of the 

 centimeter lines (not the end of the rule) of the metric 

 rule and read as accurately as you can, estimating in 

 tenths of millimeters the distance of the inch. Record 

 in a tabular form. Now get the space of two inches and 

 read the corresponding distance on the metric rule. Do 

 the same for 3, 4, 5, 6, 7, and 8 inches. Average each 

 reading to find the number of centimeters in an inch. 

 Get the general average of all your results. Get the 

 correct value from the instructor or a physics book. 



"A preliminary exercise for those teachers who wish to 

 acquaint the pupils with the units of measure before undertaking 

 the main work of the course. 



