ABSTRACT OF PROCEEDINGS. 



XXIX. 



out in cylindrical galvanized iron culture pots of familiar 

 construction, and were located, with the kind permission of 

 Mr. J. H. Maiden, in the Botanic Gardens. Details of the 

 soil and manures employed, and of the appearance at differ- 

 ent stages of the plants treated with varying proportions 

 of the substances under examination were supplied. The 

 following table summarizes the principal results obtained. 



Effect upon germination and subsequent growth of wheat of different 

 percentages of injurious substance in the soil. 





Germination 



affected. 



Germination 

 prevented. 





Growth aftected. 



Growth 

 prevented. 



NaOl 



•05 



•20 



*05 to '15 (recovered) 



•20 



N 2 0O 3 



•30 



•5 to 1-0 





•10 



•40 



NH4ONS 



•005 



•01 





•001 



•005 



NaC10 3 above '01 



•05 





•001 



•003 



As 2 3 



•05 



0*50 





•05 



•10 



Remarks were 



made by 



Mr. 



Maiden. The a 



uthors 



replied. 













EXHIBITS. 



1. Specimens of Permo-Oarboniferous Bryozoa from 

 Pokolbin and Black Head, consisting of Stenopora Tas- 

 maniensis, S. crinata, S. ? informis, Fenestella? internata, 

 Protoretepora ampla, Polypora and Polyzoal limestone, 

 exhibited by Mr. O. A. Siissmilch. 



2. Stereoscopic views, showing erosion at various parts 

 of the Hunter River to illustrate his remarks in the dis- 

 cussion on Mr. Maiden's paper, were exhibited by His 

 Honor Judge Docker. 



3. Blackfellows' Bread, Polyporus Mijlittce, C. and M. 

 (a) Section in fructification ; (b) Section developing the 

 mycelium, exhibited by Mr. R. T. Baker, f.l.s. 



