.irfi.ic.iiios <n 



. ,/('.//. Ml.l HOI'S 



llu- (li>iril)Utii>ii of till' iKTCi'iit.i^i's to !«• i-xiK-cli-d in 1,000 Mich 

 -Kiiiipli-s is iiulioatod l)\- llu- last rolumii of fri'(iui'iu;ics in 'I'aMi- III. 

 In onliT to show i;ra|)hifall\- how lliis (listrii>ution ditlVrs from that 



I 



Fig. 13 



rorri'spoiKJini; to the hinonii.il expansion these two sets of frequencies 

 are reproduced in Fig. 13. The ditiference between them is a striking 

 illustration of the signifirance of the size of the samples used in con- 

 nection with the inspection of equipment, providing we accept Pear- 

 son's results. 



