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substances of great commercial importance. The production of 

 one of the more important of these, in quantity and in a pure 

 state, is at present being investigated. 



The results of these observations seem to admit of the 

 following conclusions : — 



I. That the "Algin" of Stanford is a mixture and has no 



definite composition, although it undoubtedly contains one 

 and probably more protein bodies. 



II. That the composition of sea plants largely depends upon 



their immediate environment, and is affected by the 

 assimilation of certain salts dissolved from the rock 

 bottom on which they grow. 



III. That, from the point of view of chemical composition, 



seaweed is as good a general manure as farmyard manure, 

 though it should give best results on crops requiring 

 a potash manure. 



