Additional Notes for Students. 343 
the following : — Tesselated and encaustic tiles, 
Bristol ware, stoneware, buff terra cotta, majolica, 
general earthenware (including bread crocks, filters, 
pudding bowls, baking dishes, tea-pots, jugs, stone 
bottles and sanitary voire in great variety), enamel 
and common bricks. The supply of shale immediately 
around Sydney is practically inexhaustible. At 
Lithgow there are alsolargepottery works, but there 
the clays used are of Permo-Carboniferous age. 
8. In the suburbs, many of the roads are formed of a 
sandstone hardened by the proximity of basaltic 
dykes. The iron-stained varieties of sandstone, 
containing bands of hematite and limonite, are 
also much in request, as being more durable than 
the ordinary stone. 
9. Where undecomposed basalt is found, it is invari- 
ably used for road-making. 
10. Specimens of gneiss, with red garnets, can some- 
times be seen on our roads. This is brought in 
as ballast by ships from South America. 
APPENDIX B. 
Some Additional Notes for Students. 
There are many points concerning the geology of 
Sydney interesting enough to the student, but too technical 
to be discussed at length in a popular work. Garnets, 1 for 
instance, have been recognised sparsely distributed through 
the sandstones, but no complete explanation has been 
I Smith Roy. Soc., N.S.W., 18'Ji, p. 47. 
