﻿12 Gn the Valley of the Jordan and the Dead Sea. 



It is mainly owing to an inattention to these seriously modify- 

 ing causes, that the astonishing difference in the weight and rela- 

 tive proportion of soluble salts, found by Gay Lussac and others, 



por 



The 



water analyzed by Dr. Apjohn, and having a less specific gravity 

 than the others, was dipped up about a mile from the Jordan, im- 



med 



It will be noticed 



also, that in that case the amount of salts, which, supposed in a 

 dry state, are usually equal to one fourth the weight of the water 

 containing them, is for the same reason very much reduced. 



The density of the water was very strikingly illustrated upon 

 our bathing in the sea. We were a party of thirty-five ; nine of 

 whom bathed. Two had never before been able to swim ; there 

 however, they floated like corks. Indeed, had the water been 

 frozen to the bottom, it could not have borne us up more effec- 



Water, . 





82 1 39 



Chlorine, . 



• 



10 290 



Bromine, . 



* 



0634 



Sulphuric acid, . 



• 



trace 



Soda and trace of potash, 



» % 



3 008 



Magnesia, .... 



i • 



2 355 



Lime, .... 



t • 



] 424 





99 900 





B. 



SlLLIMAN, Jr. 



Yale College Laboratory, Jan. 6, 1845. 



In order to afford a comparison with a few of the former experiments, Mr. Sher- 

 wood adds, from Robinson's admirable " Researches on Palestine, (Vol. II, p. 343,) 

 the results uf four of the most accurate, made at different times, viz. 



By Dr. Market of 

 London, 1807. 



Specific gravity, distilled 

 water taken as a - m- 

 dard at 1-000, 



Muriate of lime, or 

 Chloride of calcium 



1211 



Gay Lussac, 

 Paris, 1818. 



1-223 



Prof. Gmelin, Dr. Apjohn, 



Tubingen, 1826. Dublin, 1839. 



1212 



1453 



3 920 



ii 



magnesium. 



sodium, 

 Sulphate of lime, 



Bromide of magnesium, 

 Chloride of pot sium, 



aluminium. 



10-246 

 1 360 

 0054 



3 98 

 1531 



695 



• • 



a 



u 



t • 



• • 



ammonium 



♦ 



* • 



32141 



1 1 -7734 

 70777 



05S7 



0-43! >3 

 2117 



0-08<)6 

 0007.-) 



2438 



7-370 

 7-839 



0075 



201 



0.005 



Water, 



24 580 

 75 420 



26 24 

 7376 



24 53! >8 

 75-4602 



18 780 

 81220 



100. 



100 



100 



100. 



