FIELDS OF PRESSURE AND MASS IN THE ATMOSPHERE. 



11! 



I \ \ V* \ > './* ' ,' \ \ Jf \ \ /^ .-.00 I 



5 10 i5 SO ... 35 W 5 " 5 K> : so so 



Fig. 19. Field of pressure. Nov. 7, 1901, represented by topographic charts giving the height of isoharie surfaces in dyn. meters. 



