THE CHEMISTRY OF THE SOIL. 



107 



Analyses of Local Seaweeds. 



The following analyses of local products, Including fresh seaweed, dried 

 sea weed and ashj have been made in the laboratory of the Departmenl at 

 different times, and are appended as representing local weeds. The variations 

 in composition are very considerable, especially in the ash, and are due 

 partly to the varying composition <>f the sea weeds themselves, and (in the 

 case of the ash particularly) to the way the fresh stuff has been dried and 

 burnt and the amount of weathering it has undergone. The samples in the 

 majority of cases were sent direct by the correspondent, and there is no 

 means of ascertaining the botanical names. Only in two or three cases 

 have these been known. 



Frksii Sk\-\\ bed. 



Water. 



Sample unnamed 80'0 



41-03 



Ash. 



118 

 16-48 



Nitrogen. Lime. "'^d?™ Potash. 



016 

 014 



041 



0-09 

 021 



0.60 



Dried Sea- weed. 



Sea- wee i> Ash. 



Lime. 



Phosphoric 

 Acid. 



Potash. 



