AVERAGES. 



8 years, 1852-59 . 



8 years, 1860-67 . 



8 years, 186S-75 . 



8 years, 1876-83 . 



8 years, 1884-91 . 



20 years, 1852-71 . 

 20 years, 1872-91 . 



241 



18 



14* 



14| 



11} 



20 

 131 



49* 

 521 



441 

 528 



44f 



31 



241 



(-9*) 

 -211 



481 



301 



+343 

 +37| 

 +33 



+ 20 

 +34f 



+30* 

 +16} 

 +12f 



+281 

 +35} +17 



40 years, 1852-91 



16* 



+32* 



+22} 



Last 20 years, per cent + or \ 

 - first 20 years J 



+1.6 



•37.3 



