WORKING OF IVORY 



245 



and thus perhaps jeopardizing a player's chance of success. 

 The ball is usually tested by propelling it down an incline 

 to strike a cushion at the other end and rebound upward 

 again. 



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The Cutting of a Billiard Ball — Section of elephant tusk from which the ball is 

 to be cut; section rounded out for cutting; the dotted lines show the path the saw follows 

 in cutting out the ball; when the cutting has been completed inside the squared section 

 this is divided into two parts, freeing the cut ball. 



Although extremes of temperature are not so serious for 

 ivory as a sudden draft, still at the docks in London, where 

 the ivory consignments are stored, explosions are occasion- 

 ally heard as loud as pistol shots, when a sudden change of 

 temperature manifests itself. 



It not infrequently happens that although the section 



