48 



ANNALS NEW YORK ACADEMY OF SCIENCES 



From 1889-1898 until 189G-1905 we liave once more a nearly station- 

 ary situation with a gradual and slow contra-clockwise pendulaiioii. The 

 following maps (Figs. 6-9) will serve to illustrate the ])rogressive change 

 which takes place. 



Insisting oiu-e more upon the fact that, in many ca,<es, the de})artures 

 utilized are most problematical and that ihe nuips must he considered to 

 be very inaccurate, 1 cannot refrain from drawing some more conclusions 

 gained from the inspection of these maps. 





Fig. 6. — Marroitlcion. 1893-1902 



Fic. 8. — Macropleion. 189r,-i90!, 









l"ii;. 7. — MamiitlciiiH. lS'.i',-tmA 



Fig. 9. — Macropleion. Jfiud-juo:/ 



The following table (Table I) gives the highest and lowest departures 

 for each decade of years. The corresponding totals show the amplitudes 

 of the anamolies of temperature represented graphically on the ten-yearly 

 maps. The highest figure is 1°.7 F. The amplitude of the macrochronic 

 variation is therefore very small. In other words, as far as temperature 

 is concerned, the changes of climate are restricted to narrow limits. ^^ 

 The smallest amplitude is 0.9 and not 0, as it ought to be, if we had to 

 deal with regular seesaw movements. 



■" It is interesting to note that T have previously found a similar fijinrc for Furope. 

 The departure maps for the decades of IS.'".! -liMKl ( I,'(>nclia1in nieiit des variations eli- 

 mati<iues, p. '.iH\ show a liijiliest ampntiuie of 1".! (\^]''.!'8 F. 



