FOR HIGH LEVELS IN THE EARTH S ATMOSPHERE. 



69 



Fiqr. S. 



20:6 



2-?. 7 



Fig. 8. Chart of p,o ooo fo"" 1898, 8 a. m., September 23, or iso.- Fig. 9. Chart of ri!;;; l""^ for 1898, September 23, 8 a. m., or lines 



bars at the level surface 80 000 as deduced from the isobars for 40 000 by of equal differences of barometric pressure between the 60 000 and the 

 subtracting the numbers on Fig. 5 from those on Fig. 7. 20 000 potential surfaces of gravity. 



Fig. 10. Chart of K.^.j for 8 a. m., September 23, 1898, or chart 

 of the level lines on the isobaric surface 27.5 inches as telegraphed. 



Fig. 11. Chart of V.,^,^ for 8 a. m., September 23, 1898, or chart 

 of the level lines on the isobaric surface 25.0 inches as deduced by adding 

 the numbers on Fig. 12 to those on Fig. 10. 



