324 



Popular Science Monihbj 



Ferreting Out the Secrets 

 of the Golf Ball 



Two Tests to Determine Whether or 

 Not a Golf Ball is "Lop-Sided" 



WHAT is the most effi- 

 cient type of golf ball? A 

 well-known British scientist 

 and golf enthusiast has made 

 some exhaustive tests with 

 golf balls of various sorts 

 under various conditions. He 

 finds that the average golf ball 

 is altogether too rough and that 

 the center of gravity is often 

 misplaced. Accordingly, he 

 experimented and the follow- 

 ing rules are the result: 



1. Float the ball in water 

 until it becomes stationary. 

 Mark it with a {)encil and roll 

 it slowly. If the mark comes 

 up slowly the center of gra\ity 

 is fairly accurate. If it comes up 

 swiftly, the ball is "lop-sided." 



2. Measure the ball at various 

 l);)ints with calipers, to determine 

 whether or not it is absolutely 

 spherical. 



3. Test one ball against an- 

 other, for elasticity, by bouncing. 



4. Throw the ball under examination 

 straight up in the air in a hea\y breeze. 

 If bad, it will swerve. 



5. Choose the smoothest ball. 



A Metal Disk Supplants the 

 Golfer's Tee 



PRACTISING golf on the lawn at 

 home is not as full of pleasure as 

 it sounds, unless one cares to import 

 enough sand or dirt to build the neces- 

 sary tees. But where a metal disk is 

 provided — a disk which takes the place 

 of the accustomed tee and performs its 

 duty with every degree of thoroughness, 

 it is possible for the golfer to continue 

 his practice without inconvenience. 



Thedisk illustrated is \er\- light. At the 

 same time it is serviceable. The player 

 can utilize it in two ways. He can sub- 

 stitute it for a dirt or sand tee, or consider 

 it a hole and improve his putting thereby. 

 With the disk it is not necessary for the 

 golfer to confine his practice to the lawn. 

 If the weather is inclement the 

 disk will ser\e its purpose inside 

 the home. 



^^r 



A Feather-Weight Disk Which Takes 

 the Place of the Accustomed Tee 



Maybe you have special needs. Write to the editor about anything within the 

 scope of the magazine. He will be glad to help you. 



