the Absorption of the Gamma Rays. 

 Table IV. — Aluminium. 



139 



t. 



pt. \x 



+ <r. 



fi. 



Difference 



between 



3rd and 4th 



columns. 



re- 

 calculated 



from 

 formula (9) 



•058 



•154 



194 



0895 



•104 



•104 



•160 



•423 



155 



059 



•096 



•096 



•322 



•853 



148 



•065 



•083 



•085 



•485 



1-286 



148 



•064 



•084 



•080 



•644 



1-717 



•142 



•064 



•078 



•080 



•965 



2-58 



130 



•061 



•069 



•071 



1-33 



3-45 



134 



•064 



•070 



•074 



1-63 



4-31 



136 



•066 



•069 



•074 



1-95 



5-18 



139 



•072 



•067 



•072 



2-28 . 



6-05 



144 



•074 



•071 



•075 



2-44 



6-49 



148 



•081 



•067 



•072 



2-94 



7-80 



140 



Table "\ 



077 



7. — Iror 



•062 



•069 



t. 



pt. 



p + a. 



p. 



Difference 



between 



3rd and 4th 



columns. 



're- 

 calculated 



from 

 formula (9) 



•0926 



■727 



•456 



•199 



•259 



•260 



•195 



1-528 



•447 



•200 



•247 



•257 



287 



225 



•422 



•201 



•221 



•244 



•388 



3-04 



■405 



•203 



•202 



•222 



•480 



3-77 



•413 



•208 



•205 



•214 



•581 



4-56 



•407 



•207 



•200 



•223 



•673 



5-28 



•405 



•211 



•194 



•208 



•763 



5-99 



•401 



•216 



■185 



•213 



Table VI.— Lead. 



t. 



pt. 



JU + tT. 



fi. 



Difference 

 between 



3rd and 4th 

 columns. 



re- 

 calculated 



from 

 formula (9) 



•061 



•696 



•759 



•449 



•310 



•316 



•121 



1-38 



•750 



•481 



•269 



•273 



•180 



2-04 



• -722 



•455 



•268 



•275 



•240 



2-73 



•696 



454 



•242 



•253 



•300 



3-41 



•697 



453 



•244 



•252 



•441 



5-01 



•696 



•460 



•236 



•246 



•561 



6-38 



•697 



482 



•215 



•228 



•705 



8-02 



•689 



•481 



•20S 



•224 



•825 



9-38 



•688 



•485 



•203 



•219 



