434 E. F. PITTMAN. 



as stated above, this rock is a freshwater and not a marine 

 sandstone, and it belongs to the Jurassic and not to the 

 Lower Cretaceous Series. 



In my earlier papers on artesian water I accepted as 

 correct Dr. Jack's description of the character and position 

 of the Blytliesdale Braystone, and stated that it was not 

 known to outcrop in the State of New South Wales. Subse- 

 quently, however, I had an opportunity of examining the 

 section between Blyth Greek and Roma, and it became 

 evident that the name had been adopted under misappre- 

 hension, both in regard to the origin and the geological 

 horizon of the rock, and in 1914 I published a statement to 

 that effect, 1 and added that, so far as it referred to the 

 lowest bed of the Lower Cretaceous Series, the term 

 "Blythesdale Braystone " was a misnomer. Again in 1915 

 I suggested 2 that the name should be abandoned, as its 

 continued use could serve no good purpose, but could only 

 lead to confusion. 



That it has led to confusion in Dr. du Toit's case is very 

 evident in his paper. 



In my latest papers it was stated that the loivest bed of 

 the Lower Cretaceous Series is not particularly porous, 

 but that bed was certainly not referred to as the "Blythes- 

 dale Braystones." 



1 E. F. Pittmah, "The Great Australian Artesian Basin and the source 

 of its water/' 1914, p. 13. 



2 E. F. Pittman, "The composition and porosity of the intike beds of 

 the Great Australian Artesian Basin," p. 11. 



