218 Mr. G. AV. Brown on Drift Weed Kelp from Orkney. 



Results of Analysis of Soluble Salts. 



Sulphuric acid, 4-915 



Sulphurous acid, '392 



Hypo-sulphurous acid, "135 



Sulphur, -6616 



Phosphoric acid, '3245 



Carbonic acid, 2'162 



Chlorine, 24-365 



Iodine, '292 



Bromine, trace. 



Potassium, 16-000 



Lime, '230 



Magnesia, "27 7 



49-754 



The deficiency here is the soda, as may be seen in the two following 

 tables in which the acids and bases are united according to their affinities ; 

 and the result of the examination of a hundred parts of the kelp is 

 given, comprehending both soluble and insoluble matter : — 



Sulphuric Sulphurous Byposulphur' Sulphur Chlorine. Potassium. Sodium. Lime. Magnesia. 

 Acid. Acid. ous Acid. 



Sulphate of potash, 2-058 — _ _ — 2-057 _ — — 



Sulphate of soda, 2-il00 — — _ _ — 1-06 — — 



Sulphate of Ume, 0-164 — — — — — — -115 — 



Sulphate of magnes. -693 — — ————— -231 



Sulphite of soda, — -392 — — — — -261 — — 



Hyposulphite of soda, — — -132 — — — -058 — — 



Sulphuret of sodium,— — — -6616 — — -9894 — — 



Phosphoric acid. 



Phosphate of soda, — -3245 — — — — -162 — — 



Carbonic acid. 



Carbonate of soda, — 2180 — — — — 1-846 — — 



Chloride of potassium— — _ _ 12-584 13-943 — — — 



Chloride of sodium, — — — — 11-570 — 7-704 — — 



Chloride of calcium, — — — — -147 — — '116 — 



Iodine. 



Iodide of magnesium — -292 — — — — — — -040 



Bromide of magnesium, trace. 



Table of per centage Composition of Orkney Kelp. 



Insoluble Salts. 



Carbonate of Ume, 2-591 



Phosphate of lime, 10556 



Oxysulphuret of calcium, 3 CaS, CaO 1093 



Silicate of lime, 3-824 



Carbonate of magnesia, 0554 



Sand, 1-575 



