Scientific Intelligence. 



visions ; the number of disturbances in each \ 



The numbers in the last column cannot be considered as ea- 

 tirelv independent of the eleven year period, and in attempting 

 to apply the theory of probabilities in reference to the number 

 of disturbances which ought to occur between the assigned lim- 

 its, it became apparent that the larsjer disturbances greatly pre- 

 ponderated, a fact no doubt intimately connected with the diffi- 

 culty in correctly allowing for the progressive change during 

 the flrst year of observation. 



SCIENTIFIC INTELLIGENCE. 



_ I. PHYSICS AND CHEMISTRY. 



1. The Saltness of the Sea : Forohhammer.— In the cours' 

 last twenty years this distinguished 



1 geologis 

 mplete analyses of water from -. 

 r from the/ ' " 



hundred i 

 ocean, but in particular from the Atlantic and the north European se» 

 connected with it. At the eighth meeting of the Scandinavian natiirai- 

 ists, at Copenhagen, in 1860, the important results of these laborious re- 

 searches were communicated.* 



(I.) Saltness of the Ocean.— The mean of 140 complete analyses giT<» 

 34-304 of salt in one thousand parts of water, unequally distributed over lo 

 regions. But the specimens being principally taken at lower latitudes, 

 this mean is too high. If we take 34 in one thousand parts as tje 

 mean saltness of the sea at the mean atmospheric pressure, and give the 

 results in differences of ten thousandths from this mean, they wiH ^^ 

 come more perspicuous. 



Thus the mean saltness of the Atlantic (35.77 thousandth) is expressed 

 by +!7.7 ; of the Californian Pacific +12.2, Japanese Pacific +4^3> ^^' 

 <han Ocean -f 1.3. These numbers confirm the conclusion of Lenz (Pogg- 

 ForhandHng«v^edde Skandinariske Naturfurekeres VIII Mode, KjobeohaTti. 



The fuli detiJl of the' Analyses is : Videnakabemes Selskabs Sk-rifter, V Ba.1*. 



Juli 



