Soils and Soil-formers.] SUBANTARCTIC ISLANDS OP NEW ZEALAND. 



771 



Analysis of Sea-birds' Dung from Bounty Islands 



(K 3006). 



Water 



. 73-01 



Free ammonia 



1-23 



Matter soluble in water — 





Phosphoric anhydride 



M2 



Ammonia 



0-20 



Organic matter 



2-30 



Potassic oxide . . 



0-21 



Sodic chloride . . 



1-02 



Matter insoluble in water — 





Phosphoric anhydride 



4-72 



Silica . . 



0-12 



Iron- oxide and alumina . . 



0-24 



Calcic oxide 



1-86 



Magnesic oxide . . . . . . 



0-60 



Sodic oxide 



0-23 



Sulphur 



0-24 



Organic matter ( — N) . . 



. 12-17 



Nitrogen 



1.02 



Manurial Value of Water-free Dung. 



Phosphoric anhydride 



Nitrogen 

 Potassic oxide 



The above would make a very powerful fertiliser. 



100-29 



22-80 

 8-92 

 0-82 



I have much pleasure in recording my appreciation of and thanks to Mr. John 

 Chilwell, chemist, and Messrs. Victor Packham, F. Leighton, and T. Rigg, assistants, 

 for the efficient and willing help rendered in carrying out this research. 



