122 BOLDIXG STONES OF QUEENSLAND. 



Lyons's quarry was tested by the Railway Department 

 along with several other stones about 1875 in connection 

 wdth the Dry Dock at South Brisbane. It was rejected, bu'^ 

 the following results are the a^"erages of tests on four 

 samples : absorption, 2.98 per cent, by weight ; specific 

 gravity, 2.39, gi%ing a weight of 1491bs. per cubic foot. 



Calvert Sandstone. 



This is a \ery friable, soft, dark ])rown sandstone. 

 It is an e\en and fine-grained stone, the grains a\erage 

 .20 mm. in diameter. The particles are angular to sub- 

 angular and are set in a small amount of clay cement which 

 is deeply stained with limonite. The stone has much less 

 cementing material than most of the sandstones used (see 

 microphotograph 4, plate VIII) . It has been used to a slight 

 extent in Perkins' Brewery, there being about 2,000 feet 

 of stone facings. It is well-protected from the weather 

 but several stones are in a badly-weathered condition. It 

 has been used to some extent for monumental purposes 

 but with little success. 'As far back as 1896, Mr. W. H. 

 Knott reporting to the Chief Engineer for Railways stated 

 that he considered this stone \ ery unreliable, and the three 

 examples of it in the South Brisbane Cemetery were all 

 decayed. 



Brodie"s Quarry supplied the stone used in the railwaj^ 

 tunnels, culverts, etc., from Grandchester to Helidon. 

 The Select Committee* on Sandstone Quarries in 1888 

 reported that Brodies quarry supplied stone in all railway 

 tunnels, culverts, etc., from Grandchester to Helidon. In 

 1896 this stone was tested with others by the Raiiwa}- 

 Department in connection with the Bremer Bridge at 

 Ipswich. The stone came from the quarry of Beatty and 

 Walsh, and had a specific gravity 2.39, weight per cubic foot 

 of 1491bs. and absorption of 4.47% of dry weight. Its re- 

 sistance to crushing was 3,733 and 4,485]bs. per sq. inch on 

 two samples crushed. The stone was rejected in favour 

 of brown Helidon stone from Wrights quarry. Many years 

 ago this stone was subjected to compression at the 

 Technical College, Sj'dney, and gave an average result of 

 4,595 lbs. per sq. inch for three samples crushed. This 



* Votes & Proc. Q"ld. Session, iii., 1888, p. 1021. 



