SERIES E. ZONE 15. LAT. 15° TO 20° N. 



529 



(Nos. 6 to 13.) Southern Mexico and Honduras. 



Computed from observations made at the following places, viz. : — 



City of llexico, bj Loui.s Berlandier, for 92 days in summer and 95 in autumn, during transient 

 sojourns in the city, in the years 1819 to 1825, and by Prof. L. C. Ervendbcrg, during the first 

 eleven months of 1856. The latter were reported to the Smithsonian Institution. 



Cordova, by J. A. Hicto. 



Fronlera Tabasco. 



Vera Cruz, by oflaeers of the Medical Department of the United States Army from June, 1841, to 

 August, 1848, inclusive, except February ; and by an observer whose name is not preserved, from 

 August to December inclusive in 1856, and during the months of May, 185T. The latter observer 

 appends a note saying that "the winds recorded in the column headed N. "W. were generally 

 N. N. W.," and, therefore, in preparing the following table they were distributed equally between 

 the columns headed North and N. W. 



Mazatlan, Mexico, 42 days in January and February, 1848. 



Minatiilan, Mexico, 12 months in 1858 and 1859. 



Mirador, Mexico, 12 months in 1858 and 1859. 



San Juan Bautiste, Mexico, 12 months in 1858 and 1859. 



Truxillo, Honduras, by E. Purdot, July to December inclusive, 1854. 







Kklative Prevalehce of Winds from the 







T" 





Mo 











Different Points of the Compass. 











influences. 



■c 





«■ 





W 





,^ 





i^ 













Place and 



Time of 





i^ 





oJi 





^■a 





bH 





Direction of 



f-'^ 











i« 



kind of 

 observations. 



the year. 



.d 





^ 



J2 . 

 1,03 

 J. 



"S 





■s 



it 





lesultant. 







Direct 



on. 



£ 



o 



a 







i 



11 



3 



mi: 

 102 



105 



41 



6 



3 











k" 









.56 



3 





' 



'ii ' 



Spring 



5 







S. 13° 



28' E. 



.71 



S. 



6* 



=E. 



92 







Summer 



59 



34 



29 



81 



13 



8 



4 



42 



4 



N. 62 



36 E. 



.29 



N 



27i 



E. 



.31 



92 



to 





^ ^ ' 



Autumn 



44 



50 



65 



11 



6 







11 



86 







N. 16 



2 E. 



.48 



N. 



ig' 



E. 



.58 



91 



s 





_• > 



o »- 



Winter 



4 



6 



9 



30 



30 



29 



20 



4 



7 



S. 17 



18 W. .45 



S. 



39 



W. 



.38 



60 



'"' 





^ m 



'I'he year' 





















S. 38 



22 E. 



.17 













a 

 " 



n3 



a 





Spring 



"is 



"63 



12 



384 



330 



182 



"32 



6 





S. 13 



49 E. 



.66 















'S 



•" m 



Summer 



161 



84 



68 



272 



28 



18 



10 



90 





N. 77 



41 E. 



.32 













2 





° £ . 



Autumn 



160 



143 



226 



69 



20 







58 



222 





N. 24 



44 E. 



.43 













*^ 



>S 



a a 



Winter 



20 



18 



50 



259 



166 



201 



147 



33 





S. 8 



42 W. 



.47 













a 



3 





The year' 





















S. 43 



9 E. 



.27 













§ 



QQ 



. ^ 



Spring 



3.60 



5.73 



6.00 



3.84 



3.14 



4.79 



5.33 



3.00 





















K 





13 p. 



Summer 



2.73 



2.47 



2.34 



3.36 



2.15 



2.25 2.50 



2.25 





















S 





> m ■ 



Autumn 



3.64 



2.92 



3.48 



6.27 



3.33 



5.80 



2.64 





















%-i 





a -S 



.is 'a J 



it 



Winter 



5.00 



3.00 



5.56 



8.63 



5.53 



6.937.35 



11.00 





















b 





Spring 



13 



5 



18 



2 



3 



3 



1 





N. 56 



18 E. 



.51^ 



N. 



G9 



E. 



.25 





o 



d -S 



Summer 



13 



7 



13 



11 



• 4 



4 5 



12 





N. 38 



30 E. 



.26 



N. 



71 



W. 



.03 





«> 



S o . 



^ o3 1 



Autumn 



12 



2 



3 



2 



6 



2 



17 





N. 24 



27 W. 



.45 



N. 



61 



W. 



.43 







12 



o t 



Winter 



3 







5 



3 



2 



1 1 









S. 71 



19 E. 



.38 



S. 



29 



E. 



.36 







o 



[Kg I 



The year' 













... 1 ... 







N. 44 



35 E. 



.27 













7. f 



Spring 



18 



"iG 



"21 



104 



108 



41 9 



'"4 







S. 20 



2 E. 1.59 



S. 



5 



E. 



.55 





City of Mexico. 



Summer 



254 



355 



96 



111 



34 



17 59 



111 



64 



N. 31 



1 E. 



.49 



N. 



13 



E. 



.43 





Aggregate imm- ■ 



Autumn 



111 



129 



85 



13 



12 



19 



111 



7 



N. 18 



43 E. 



.56 



N. 



^ 



E. 



.53 





ber of obaerva- | 



Winter 



7 



6 



14 



33 



32 



29 21 



4 



7 



S. 2 



33 W. 



.40i 



S. 



23 



W. 



.44 







tions. [. 



The year' 













... j ... 







S. 89 



26 E. 



.15i 













From tWs table we obtain the following summary of results : — 1 





Spring. 



Summer. 



Autumn. 



Winter. 1 



The year. 



Average velocity of all winds in miles per hour 



3.82 



2.73 



3.34 



6.82 





4.18 



Velocity in mean direction, on the supposition that the winds 

















from every point of the compass move with the foregoing 

















average velocity 



2.75 



.81 



1.61 



3.06 





.79 



True velocity in mean direction, giving to the winds from the 

















several points of the compass each their own average velocity, 

















as shown in the table above ....... 



2.54 



.88 



1.43 



3.19 





1.11 



Excess of the latter over the former ..... 



—.21 



+.07 



—.18 



+ 



.13 





+ .32 



' Computed from the resultants for the seasons. 



67 May, 1875. 



