XXX. ABSTRACT OF PROCEEDINGS. 



and 8 faces respectively. The model for the normal group 

 of the monoclinic system consists of a mirror pierced by an 

 axis capable of rotation, the cards representing faces are 

 fixed in such a way as to show, by rotation of the axis 

 through 180°, that the general form consists of four faces 

 only, and is open. In the normal group of the triclinic 

 system, where there is only a centre of symmetry, this is 

 represented by a spherical cork, on opposite sides of which 

 two equal and similar cards are carried showing that every 

 form in this group is open and consists of two faces only. 



Remarks were made by Prof. David, Mr. S. H. Barra- 

 clough, and Mr. G. H. Knibbs. 



EXHIBITS. 



Prof. Liversidge exhibited specimens of metallic calcium 

 and described its preparation and physical properties. 

 Some remarks were made by Mr. Guthrie. 



Mr. J. H. Maiden exhibited and commented upon 

 the following : — 



1. The Thready-barked She Oak from Northern N.S.W. 

 (Casuarina inophloia). Remarkable for the texture of its 

 bark, its coarse medullary rays, and the uninflammable 

 character of its wood. 



2. Fresh male amenta of Araucaria Rulei, an interest- 

 ing New Caledonian species which rarely produces male 

 flowers in Sydney. 



3. Sclaginella lepiclophylla, an American plant (Mexico 

 to Peru, etc.) which, artificially scented with oil of cinna- 

 mon is at present being sold in Australia as the true "Rose 

 of Jericho," which is a Crucifer from Palestine. 



Some remarks were made by Mr. R. T. Baker. 



Mr. Henry Deane, m.a., m. inst. ce., exhibited a series of 

 photographs of the Frank, (Alberta Territory, Canada) 



