34 QUESTIONS AND ANSWERS 



Farrington and Woll have figured out that the num- 

 ber of revolutions should be those given in the fol- 

 lowing table : 



Diameter of Revolutions 



the disk per minute 



10" 1,074 



12'' 980 



14" 909 



16", 848 



18'' 800 



20'' 759 



22" 724 



24" 693 



What conveniences should be attached to a Bab- 

 cock tester run by steam? 



1. Steam gauge. 



2. Steam brake for stopping the disk. 



3. Speed indicator. 



4. Water heater and means of filling bottles 

 quickly. 



What points should be observed in selecting a 

 machine? 



1. The machine should be durable and safe to 

 operate. 



2. Should run smoothly. 



3. Should have a capacity corresponding to the 

 work and carry an even number of bottles. 



4. Pockets should always swing free so the 

 bottles may come to an upright position when the 

 disk comes to rest. 



5. The bottles should be protected against the 

 entrance of oil from the machine. 



