the Ash of Armeria niaritima. 



269 



Algae, but to an endosmotic action of the roots of Armeria, by 

 means of which small quantities of iodine-compounds present in 

 the sea-water are taken up by the plant in the same manner in 

 which any other soluble salt would be absorbed, when presented 

 to the roots of this plant in a watery solution. 



Notwithstanding the repeated washings of the plants, a consi- 

 derable quantity of fine sand remained concealed between the 

 fibres and scales of the roots, as will be observed in the follow- 

 ing analyses : — 



Ash Analyses. 



No. I. Ash of specimens of Armeria maritima grown close to 



the sea-shore in the neighbourhood of Edinburgh : — 



. ^ , ,^ After deduction of sand, carbonic 



Actual result. 



Potash . . . 

 Soda .... 

 Chloride of sodium 

 Iodine . 

 Lime .... 

 Magnesia . . 

 Oxide of iron . 

 Alumina . 

 Phosphoric acid 

 Sulphuric acid . 



Carbonic acid 

 Silicic acid 

 Sand . 



6-73 



3-39 



18-22 



traces. 



10-24 



8-33 



6-01 



1-50 



4-27 



601 



1-73 



1106 



23-20 



100-69 



acid, and calculating for 100. 

 8-86 

 4-47 

 24-03 



13-50 

 10-98 



7-92 



1-97 



5-77 

 7-92 



14-58 



100-00 



No. II. Ash of specimens grown on an elevated rock opposite 



the former locality : 



Actual result. 



Potash 



Chloride of potassium 

 Chloride of sodium 

 Lime 



Magnesia . 

 Oxide of iron . 

 Phosphoric acid 

 Sulphuric acid 

 Silicic acid . 

 Carbonic acid . 



Sand 25-12 



6-32 

 5-88 

 13-19 

 10-33 

 8-55 

 4-89 

 8-40 

 6-21 

 7-76 

 2-87 



Deducting sand, carbonic acul, 

 and calculating for 100. 



8-85 



8-21 

 18-44 

 14-44 

 11-95 



6-83 

 11-75 



8-68 

 10-84 



99-53 



100-00 



