558 Neiu Zealand Institute. 



On the Capability of certain Sulphides to form the Negative Pole of a 



Galvanic Circle. 

 On the Reduction of certain Metals from their Solutions by Metallic 



Sulphides, and the Relation of this to the Occurrence of Gold in the 



Native State. 

 On the Electro-motive Power of Metallic Sulphides. 

 On the Conducting-power of various Metallic Sulphides for Electricity. 

 On the Electro-motive and Electrolytic Phenomena developed by Gold 



and Platina in Sdution of Alkaline Sulphides, &c. 

 On the Poisonous Principle of the Karaka. 



Further Researches on the Precipitation of Clay from Clay Water. 

 On the Presence in certain Vegetable Fibres of a Substance susceptible 



of Well-marked Colouration by Chemical Treatment, and the Dis- 

 crimination of such Fibres thereby. 

 On a New and Easy Process for generating Sulphuretted Hydrogen. 

 On the Absorption of Ammonia by Cellulose in Presence of P.jtash, and 



its Proposed Application to the Removal of it by this Method from 



certain Organic S dutions. 

 On a New Method for the Preparation of Sulpho-cyanide of Potassium for 



the Laboratory. 



