468 



Mr. J. H. J. Poole on the Radium Content 



Table I. 



Distance from 

 South Portal 

 in metres. 

 34 



Nature of Rock. 



Radi um 

 Content. 



1-2 



55 

 69 



Talc Felspar Schist 



Quartz Schist 



2-6 

 1-5 



95 



Talc Schist 



1-9 



145 

 190 



Quartz Schist 



Felspar Biotite Talc Schist 



1-6 

 22 



194 





2-1 



205 



Quartz Schist 



1-4 



235 

 249 

 265 



Felspathic Schist 



Schist 



Mica Schist 



3-2 



2-8 

 2-8 



273 



Quartz Schist 



1-8 



212 

 225 

 305 

 345 



Schi st 



Mica Schist 



Felspar Biotite Schist 



Quartz Schist 



1-6 

 15 

 2-6 

 1-9 



355 

 395 



Hornblende Schist 



Talc Felspar Schist 



33 

 65 



427 



470 



Schist 



Talc Schist 



10 



1-7 



473 



480 



Quartz Schist 



Talc Schist 



0-9 

 08 



546 



580 



Quartz Schist 



Black Schist 



2-2 



3-3 



610 



Talc Schist 



1-6 



826 



Quartz Schist 





911 



Ditto 



30 



917 



1000 



Talc Schist 



Quartz Schist 



1-9 



2-2 



1095 



Talc Schist 



1-3 



1220 

 1230 



Schist 



Acid Hornblende Schist 



1-8 



3-0 



1385 



Talc Schist , , 



1-4 



1480 



Quartz Schist 



3-1 



1505 



Talc Schist 



2-7 



1522 



Schist Lustre 



2-8 



1531 



Ditto 



4-1 



1580 



Talc Schist 



1-2 



1640 



Ditto 



09 



1720 



Quartz Schist 



64 



1735 

 1800 

 1840 



Talc Schist 



Schist 



Ditto 



1-7 



25 



59 



1950 



Talc Schist 



1-3 



2245 



2280 



Schist , 



Ditto , 



2-8 



4-4 



2464 

 2620 



Talc Schist 



Limestone 



2-3 



10 



2717 

 2995 



Schist 



Ditto 



2-2 



245 



3545 



Ditto 



1-3 



