162 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 51 



we shall find 



v = 252 r; G = 566 .5 r; b - b = 283 r 2 



We apply these formulas to the central part situated between 

 the center and r = 0.14 (where the current is one of ascension). 

 By constructing the curves of v and G we shall also find by graphic 

 interpolation their values for the region between r = 0.14 and r = 

 0.3 (where the transition to horizontal motion occurs). The 

 results are given in the following table : 



(2) Whirlwind of mean velocity about a barometric minimum (see 

 fig. 10). 



Consider the central part of the whirlwind No. 2 in § 12. 

 Let 



= 55°; fi = 0.0009596 (r - 0, b = 735" 1 " 1 ) 



we shall find 



v = 3.082 r\ G = 0.583 r; b - b = 0.2915 r 



We apply these formulae to the central part (ascension) situated 

 between the center and r = 5 , but we find by graphic interpolation 

 the values for the part situated between r— 5 and r = 7 , as fol- 

 lows : 



r = 0° 1° 2° 3° 4° 5° G° 7° 



v = m 3.1 m 6.2 m 9.2 m 12. 3 m 15. 4 m 16 m 15 m 



q _ Qmm q 5gmm \ 17mm \ 75 min 2.33 mm 2.91 mm 3 20 mm 3.08 mm 



&-,&„ ="O mm 0.29 mm 1.17 mm 2.62 mm 4.66 mm 7.28 mm 10.38 mm 13.58 mm 



9- 



132° 75° 42° 18° 0° 



(3) Whirlwind about a barometric maximum (see fig. 11). 



Consider the central part of the whirlwind of §13. 



Let 



p = 35°; 



- = 0.0009281 

 P 



we shall find 



v = 1.823 r\ G = 0.32 r; b - b = 0.16 r 2 



