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EXTREME 

 DIFFERENCE 



of the 

 max. and min. 



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 H © OS r-J 05 O W (M TP r-( CO CO 



CO* CO rj" rl* «-i CM* rH* CM* tP U5 



MEAN 

 LROMETRIC 



heights. 



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co' co" oi cm" oi co" co* co co* cm CM cm 



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RESULTS 



of 14 years 



January ... 

 February 

 March . . . 

 April , 

 May 



June 



July 



August ... 

 September 

 October . . 

 November 

 December 



5 ^ 



8 a a 



t"* 05 CO CM tP c-< CM CO. CM CO rj © 

 iffl i©* wO* O iO uO rj* so co* *si «o o 

 -HrlHHHnHHrHHH 



MEAN 



of the 

 oscillations. 



B 



CO CO CO CO TP CO CM O Tf TP 

 CM CM CM CM* CM r-* r-* CM* CM CM* CM CM* 





MEAN 

 kROMETRIC 



heights. 



.OCOr-COOTfrP— ITPr-^'OCO 



ooo— <o^-^— »oooo . 



$5CDCOCDCOCOCOCOCOCCCOCO 

 © o* o* © ©* ©* ©* ©* © ©" © ©' 







RESULTS 



of a year. 

 — — — 



January 1 



February . . , 



May 



June 



July 



August , , . 

 September . . . 



October 



November ... 

 December ... 



