43 



EXPERIMENT 34. TO FIND THE COST PER HOUR OF A 

 SINGLE GAS BURNER IN YOUR HOME 



i. Read carefully your home gas meter at some conven- 

 ient time of the evening (Fig. 32). Then turn on either a 

 single gas jet or a known number of jets, and allow them 

 to burn for a convenient time. (Do not use a mantle 

 burner.) It is important that you note the exact time at 



1OO THOUSAND 1O THOUSAND 



100 THOUSAND 10 THOUSAND 1 THOUSAND 



FIG. 32. Gas meter dials. 



which the jets are turned on and off ; it is also important 

 that you know just how many jets were burning during 

 the experiment. In your laboratory notebook make two 



