222 



FOOLE ON THE SHORES OF THE DEAD SEA. [Dec. 8, 1856. 



1. Can the lebias found at Em Barghek and Ain Terabeb live in 

 the Dead Sea ? 



2. Are the minnows in the Jordan, mentioned by Lynch, not 

 also lebias ? 



3. Are the waters of the Dead Sea of different densities, as well 

 as temperatures, at different depths, as well as at different localities ? 



4. What is the mean dew-point, force of vapour, and relative 

 humidity on the shores of the Dead Sea ? 



5. What is the mean temperature, as well as amount of radiation ? 



6. What is the mean height of barometer and boiling-point of 

 water ? Lynch gives the latter as 215°. 



7. What do the wild-fowl feed upon which dive in the Dead 

 Sea? 



8. What causes the phosphorescence observed by Lynch in the 

 Dead Sea ? 



9. What is the difference of sea-level at different seasons of the 

 year, and will the evaporation compensate for the volume of water 

 flowing into the Dead Sea ? 



10. I would also call your attention to the close approximation 

 made with the Aneroid Metallique, when corrected by Delcros's 

 formula for temperature and latitude, as shown in the accompanying 

 table of heights of mountains in Westmoreland : — 



Names of Mountains. 



Helvellyn 



Fairfield 



Highstreet 



Wansfell* 



Kirkstone Pass 



Ewe Crag, Loughrigg Fell 



Heights per 



Aneroid in feet, 



by H. Poole. 



3056 

 2837 

 2693 

 1649 

 1487 

 1123 



Col. James, 

 Ordnance 

 Survey. 



3117 

 2861 

 2722 

 1598 

 1466 

 1101 



Difference. 



-61 

 -24 

 -29 

 -1-51 



+ 21 

 -f-22 



It would thus appear that this very portable instmment may be 

 advantageously employed for topographical surveying by using a 

 proper formula for corrections. 



If any further inquiries were made on the shores of the Dead Sea, 

 it would be a good opportunity to carry a series of aneroid levellings 

 through the valley of Acaba to the Eed Sea; for in none of the 

 above six heights is there near so much difference as is recorded 

 between the barometrical altitudes of different places in Syria. 



I found the temperature of the Dead Sea, in the month of October, 

 about 82° Fahrenheit near the surface. The temperature of air 



* I was not quite at the summit of Wansfell, which I assumed to be 30 feet 

 above me, but it may not have been quite so much. 



