- 



IOWA ACADEMY OF SCIENCE 



_• sents typical results of these experi- 



f using four settings was not adopted at 

 ts were performed. - 

 Electing power are genuine, there are 

 should be It will be n. I 



stant throughout the 

 - - in a way s si ted by d. 



se brilliant - - - 



5 



55 «3 



A •' - M 



65 



y 





- - si is along 



Chis is _ 1 with what 



t is _ - 3 :hat the 



tesl tens s of 1 ^d light are taken as 



I " squai : v sin I s;le throng 



rned from its sition parallel to the 



y. Th - suits _ -n eorro results 



- no doubt add to the 

 ■ 



:elluriuni. formed in 



s planned - laboratory to make a careful 



stants - ment. but up to the 



this work is not was thought how- 



prelimi: ; eriments or 



in the more extended work. 



used was s ieular hexagonal cry- 



