188 R. T. BAKER AND J. N ANGLE. 



(c) Crinoidal. Cudal 



Bibbenluke Michelago 



Gresford (b) Brecciated. 



Hockley Blue Borenore 

 4. White and Statuary 6. Laminated Marbles. 



Marble. Adelong (Gilmore) 



Abercrombie Caves Gilmore 



Brundle Creek Norongo 



Caloola Queanbeyan 



Coolalie Tarrabandra 



Cow Flat 7. Onyx Marble. 



Gilmore Moruya 



Havilah 8. Unclassified. 



Michelago Bungendore 



Parkes Cooma 



Wombeyan Caves Gundagai 

 5. Blue and Grey Marbles. Jenolan Oaves 



(a) Variegated, Moonbi 



Bungonia Tumut 



Cowra Walli 



Yarrangobilly 



2. Durability.— It is perhaps too early in the life of our 

 stones to give data concerning their durability, but our 

 granites, trachytes, and sandstones so far appear to give 

 satisfaction in this direction, although in a few isolated 

 cases sandstones have shown signs of weathering or dis- 

 integration. This latter defect is perhaps due to a want 

 of a proper selection of stone, for it appears the time has 

 come when a stone expert is necessary, just as there is in 

 commerce a wool or timber expert, one who should be well 

 versed in petrology and make the study of this science his 

 profession, and whose business should consist of passing alL 

 stone before it is placed in a building. There certainly 

 must be something io the art of selecting say a sandstone, 



