XXXV111. 



ABSTRACT OF PROCEEDINGS. 







Barley. 



Germination 

 affected 



Germination 

 prevented 



Growth 

 affected 



Growth 

 prevented 



NaOl 



•10 



•25 



•10 



•20 



Na 2 00 3 



•25 



•60 



•15 



•40 



NEUONS 



inconclusive 









NaOlO 



•005 



•007 



•003 



•006 



As 2 3 germination unaffected by *62 



•05 



•10 



Rye. 



Germination 

 affected 



Germination 

 prevented 



Growth 

 affected 



Growth 

 prevented 



NaOl 



•10 



•40 



•15 



•20 



Na 2 OO s 



•25 



•50 



•25 



•40 



NEUONS 



inconclusive 









NaC10 3 



•001 



•006 



•002 



•004 



As,G 3 



*2 above '4 



•15 



•30 



Remarks were made by Mr. Maiden, Prof. Schofteld and 

 the President. Prof. Guthrie replied. 



2. "The classification and systematic nomenclature of 

 Igneous Rocks," by H. Stanley Jevons, m.a., b.sc, f.g.s.; 

 Lecturer in Mineralogy and Petrology in the University 

 of Sydney. 



The author first passes in review the general principles 

 of classification, illustrating them by references to the 

 properties of igneous rocks. The properties selected as 

 bases of classification must depend upon the purpose for 

 which the classification is required. Classification serves 

 three main purposes : — (1) As an aid to the memory and 

 a store of knowledge, and hence for teaching or didactic 

 purposes ; (2) to assist in research ; (3) as a basis of a 

 systematic nomenclature. The manner in which classifi- 

 cation may assist in research is explained at length ; and 

 it is pointed out that a systematic nomenclature may be 

 applied to almost any classification, so long as it does not 

 consist of too many ranks, i.e. successive subdivisions on 

 different properties. Whilst special classifications will 

 always be required for special lines of research, it would 

 be very useful to have a general classification adapted to 



