262 Mr Purvis, Bracken as a source of potash 



Cambridge Bracken. 



To estimate the cost of collection is difficult as the conditions 

 of transit and labour are variable and estimates for one locality 

 would be useless for another. It is evident, however, that bracken 

 is a valuable source of potash : but its economic application as a 

 fertiliser will be controlled by the requirements and conditions of 

 the neighbourhood where it grows. 



I have to thank Mr Williams for supplying the Welsh bracken, 

 and Mr Lynch, of the Cambridge Botanic Gardens, for samples 

 from the gardens. 



