XXVi. ABSTRACT OF PROCEEDINGS. 
was suggested to describe igneous rocks of brecciform 
appearance exhibiting intrusive relations. 
5. Dr. C. ANDERSON:—Liesegang figures and photographs. 
of restored Iguanodons in the Brussels Museum. 
Monthly Meeting, 14th August, 1918. 
Acting Professor COTTON in the Chair. 
Five members and one visitor were present. 
EXHIBITS: 
1. Mr. W. T. WaTKIN BROwN:—Crystallised Azurite, 
Broken Hill. 
2. Mr, W. S. Dun:—Mr. W. HE. ABBoTT’s book, ‘* Mount. 
Wingen and the Wingen Coal Measures’’; only twenty-five 
copies of this interesting and valuable work have been 
issued. 
3. Dr. C. ANDERSON :—Beryl Crystals from Torrington, 
N.S.W. 
Dr. C. ANDERSON gave a short lecture, ‘‘Growth and 
Solution in Crystals,’’ illustrating his remarks by crystals 
of Beryl from Torrington, N.S.W., which exhibit well 
marked hexagonal pits and hillocks on the basal plane. A 
summary of some of the more important features of growth 
and solution in crystals was given, and the lecturer dis- 
cussed the question of the origin of the peculiar markings 
on the Torrington beryl. The hexagonal pits have their 
edges parallel to the intersections of the base, and the first 
order pyramid, and are bounded by planes of this pyramid 
and the base which forms the bottom of the pits. Other 
crystals show hillocks similarly oriented, and also bounded 
by planes of the first order pyramid and the base. These 
features are regarded as probably due to solution, although 
it is unusual for faces so produced to be so smooth and 
well-formed as they are in this case. 
