Journal Royal Society KS. WVol XXV. Plate XXI. 



S.r.LBiGH &C'..LITH 



FIG. I , BASALT , ORANGE, N EW SOUTH WALES, X 50 DIAMS . 

 FIG. 2, OLIVINE BASALT BATH U RST, N. S.WALES, XSO DIAMS.. 



