300 MESSRS. THORPE AND MORTON ON THE 



1. Chlorine 18*62650 



2. Bromine '06133 



3. Sulphuric acid (SO^) 2-59280 



4. Lime (total) '575^'^ 



5. Calcium carbonate '04754 



6. Magnesia 2'o3233 



7. Mixed alkaline chlorides 27'i8363 



8. Potassium '39131 



9. Sodium 10*40200 



10. Ferric oxide '00465 



11. Ammonia "oooii 



12. Nitric acid '00156 



13. Fixed constituents 3y^3^55 



Comparison of the total amount of fixed constituents 

 found directly, with the sum of the several constituents 

 associated on the assumption that the strongest acid is 

 combined with the strongest base_, &c. 



Sodium chloride 26*43918 



Potassium chloride '74619 



Magnesium chloride 3'i5°^3 



Magnesium bromide "07052 



Magnesium sulphate 2*06608 



Magnesium carbonate traces. 



Calcium sulphate i"33i58 



Calcium carbonate '04754 



Lithium chloride traces. 



Ammonium chloride -00044 



Magnesium nitrate -00207 



Silicic acid traces. 



Ferrous carbonate '00503 



33-85946 

 Amount directly determined 33*83855 



The water employed in the foregoing analysis was col- 

 lected in mid- winter ; it becomes interesting to know if 

 its composition is uniform during the various seasons of 

 the year. Fortunately we can offer some evidence on this 

 point. In August 1865, after a continuance of exception- 

 ably fine weather,, one of us collected some sea- water in 

 the neighbourhood of the Bahama-Bank Light-ship^ and 

 determined the total quantity of its saline constituents, 

 together with the amount of chlorine and sulphuric acid. 



