98 THE MARINE AQUARIUM. 



Many persons who reside at the sea-side, or even those 

 who live in a city, can send once or twiee in a "fortnight 

 for sea water, and in this way keep their stock alive; but 

 we must remember that it is not then an Aquarium: as 

 the water needs changing. 



Finding that sea water was apt to putrefy, Mr. Oosse 

 reasoned thus : " Why was it not possible to manufacture 

 sea water that will answer the same purpose as the genu- 

 ine article as procured from the ocean itself?" and taking 

 as his guide the composition of sea water as revealed to us 

 from the analysis of celebrated chemists, which is as fol- 

 lows : 



Water 96.4744 



Common salt or Chloride of Sodium 2.7059 



Chloride of Magnesium 8866 



Chloride of Fotassium 0765 



Bromide of Magnesium 0029 



Sulphate of Magnesia or Epsom salts 2296 



Sulphate of Lime or Gypsum 1107 



Carbonate of Lime 0088 



Loss not accounted for 0002 



he manufactured some ; and communicated the results to 

 the "Magazine of Natural History" in July 1854. In 

 making the artificial sea water, Mr. Gossc left the salts of 

 Lime and the Bromide of Magnesium entirely out of the 

 question, as they occurred only in very small quantities 

 and he found that water, formed according to the following 

 recipe, answered all the purposes of the real sea-water in 

 preserving alive plants and animals in his Aquarium : 



