United A 



her Maps and c 



curately, I have endeavored to combine them so as to obtain a 

 few normal values. I combined all the observations north of 

 latitude 70° in one general average, and all the observations 

 between latitudes 60'' and 70° in a second average. I then di- 

 vided the observations of Kaemtz (Met, p. 298) into similar 

 groups, each embracing ten degrees of latitude, viz., 60°— 50° ; 

 50°— 40°, etc., and thus obtained the normal values shown in 

 tbe table at the bottom of this page. 



Mean monthly oscillation of the barometer for winter and summer. 



m. Confidence, Br. N. 



Torneo, Finland, 



Haparanda, Sweden, .. 

 Godthaab, Greenland, . 



Umea, Sweden, 



Christiansund, Norwaj 

 Hernosand, Sweden, . 

 Aalesund, Norway, . . 



48 W. 1-220 0-693 



3 0-921 



Parry's first voyage. 

 Collectanea Met., 5 years obs. 

 Met. lag. i Norge, 2 years obs. 

 Rosa 2d Arctic Expedition, 2^ y 



. E.jl-642,0-92Hj 



Jakoiitsk. Siberia, 

 Fahlun, Sweden,.. 

 Abo, Russia, 



Met. lakttagelser. 1 859-69. 



Collectanea Met., 3 years obs. 



0-97 1 jObservationes Met, 15 years obi 



aemtz Met., p. 298. 



et. lagttagelser i ^Torge, 9 yes 



et. lakttagelser, 1859-69. 



[et. lag. i Norge, 9 years obs. 



[et. lag. i Norge, 5 years obs. 



Monthly oscillation of the barometer {normal values). 



Latitude. 



^?r 1 



x-cr- 



IS 



1^^%1 ^l 



"mT 



,.„„„ 



6 l'2 



0-110 1 



0-106 



0-125 





115 



















- -005 









0-404 







255 









0-362 



0-690 























568 









0-744 









694 



















+ -032 



74 9 



1-344 1 



0-7 5.-5 



1-757 



- -4!3 1 



933 





