Readden — Group of Radium-hearing Springs. 307 



Analysis of General Sample of Sinter from Face of Bed next to 



the River. 



Per cent. 



Sand and Si0 2 0-51 



Organic matter 2-29 



C0 2 39-39 



CI -.. Trace 



S0 3 Trace 



CaO _ 48*84 



SrO 1-16 



BaO in HC1 solution _ _ _ Trace 



MgO ._. 1-37 



Fe A l 0-20 



AiAf- 



MnO __• 0-C2 



Na 2 Trace 



Li 2 _.. Trace 



BaS0 4 _: 5-42 



99-80 



Other general samples from different parts of the bed were 

 tested and baric sulphate found to be present in all of them, 

 the percentage ranging from 3*25 to nearly 10*0 per cent. 

 As the sinter was richer in baric sulphate as we approached 

 the end of the bed where the Drinking Spring is located, I 

 took two samples, one from near the spring and the other at 

 the spring, and analyzed them with the following results : 



Analysis of Sinter taken 8-10 feet from the Drinking Spring. 



Per cent. 



Organic matter with a little free sulphur 3*43 



CaC0 3 .._ 26-46 



BaS0 4 66-98 



Fe, Mn, Na, K and Li not determined [3*13] 



100-00 



Analysis of Sinter taken within 2^ feet of the rim of the Drinking 



Spring. 



Per cent. 



Organic matter with a little sulphur 3*11 



CaC0 3 1-84 



BaS0 4 1 94-62 



Mg, K, Na and Li Traces 



99-57 



The spring designated the Bird's Nest is building a cone of 

 this baritic sinter : it has the following composition : 



