X-Ray Analysis of the Gingin Upper Greensand. 
243: 
The author wishes to express his thanks to the University of Western 
Australia Text Books Board and to the authors of “ Junior Geology ” for per- 
mission to reproduce Fig. I. To the Text Books Board the author is also- 
very greatful for the loan of the block of this figure. To Miss M. Bowmen the 
author’s thanks are due for the drawing of Fig. 2. 
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