420 Bigelow — Meteorological Elements of the United States- 



Table V. — Annual Variations of the Vapor Pressure. 





Pacific. 



Rocky Slope. 



Central-Eastern. 



Year. 











V. | M. 



V.-M. 



V. 



; 



VI. 



V.-M. 



V. 



M. 



V.-M. 



1873 



-■004 



000 



-•004 



-•002 







002 



000 



-•012 



-•010 



—•002 



74 



+ •006 



+ •003 



+ •003 



+ •006 



+ 



003 



+ 



003 



+ 



002 



— 



006 



+ •008 



75 



+ •015 



+ •010 



+ •005 



- -007 



+ 



003 



— 



010 



— 



019 



_ 



004 



—•015 



76 



+ •010 



+ •012 



-•002 



+ •012 



+ 



009 



+ 



003 



— 



001 



+ 



002 



—•003 



77 



+ •020 



+ ■012 



+ •008 



+ •007 



+ 



Oil 



-r 



004 



+ 



008 



+ 



002 



+ -006 



78 



+ •010 



+ •006 



+ •004 



+ •029 



+ 



016 



+ 



012 



+ 



019 



+ 



007 



+ •012 



79 



+ •006 



+ •006 



000 



+ •015 



+ 



020 



— 



005 



+ 



001 



+ 



012 



—•on 



1880 



-•016 



+ •002 



—•018 



+ -020 



+ 



023 



— 



003 



+ 



010 



+ 



014 



—•003 



81 



+ •008 



+ •002 



+ •006 



+ -030 



+ 



020 



+ 



010 



+ 



021 



+ 



009 



+ -012 



82 



000 



+ ■006 



-•006 



+ •022 



+ 



022 





000 



+ 



015 



+ 



012 



+ •003 



83 



+ •012 



+ •020 



-•008 



+ •012 



+ 



020 



— 



007 



— 



001 



+ 



010 



—•Oil 



84 



+ •023 



+ •024 



-•001 



+ •023 



+ 



016 



+ 



007 



+ 



015 



+ 



007 



+ •008 



85 



+ •056 



+ •027 



+ •029 



+ •011 



+ 



014 



— 



003 



— 



002 



+ 



003 



—•005 



86 



+ •028 



+ •029 



-•001 



+ •012 



+ 



•013 



— 



001 



+ 



008 



+ 



001 



+ •007 



87 



+ •016 



+ •024 



-•008 



+ •013 



+ 



•008 



+ 



005 



— 



004 



— 



002 



—•002 



88 



+ •018 



+ •010 



+ -00S 



+ •006 



+ 



•007 



— 



001 



— 



014 



— 



002 



—•012 



89 



+ •004 



+ •004 



000 



000 



+ 



•001 



— 



002 



— 



001 



— 



005 



+ •004 



1890 



-•014 



-•001 



-•013 



+ •004 



— 



•004 



+ 



008 



— 



001 



— 



006 



+ •005 



91 



-•004 



-•008 



+ •004 



-•016 



— 



•on 



— 



005 



— 



006 



— 



006 



000 



92 



-•012 



— •012 



000 



-•016 



— 



•015 



— 



001 



— 



008 



— 



005 



000 



93 



-•017 



-•014 



-•003 



- -025 



— 



•020 



— 



005 



— 



013 



— 



008 



—•005 



94 



-•014 



-•014 



000 



-•023 



— 



•018 



— 



005 



— 



001 



— 



006 



+ -005 



95 



-•022 



-•014 



-•008 



-•022 



— 



•016 



— 



006 



— 



016 



— 



005 



—•Oil 



96 



-•007 



-•016 



+ •009 



-•001 



— 



•013 



+ 



012 



+ 



006 





000 



+ •006 



97 



-•012 



-•016 



+ •004 



-•009 



— 



•on 



+ 



002 



— 



002 



+ 



001 



—•003 



98 



— •022 



-•012 



-•010 



-•009 



— 



•006 



— 



003 



+ 



013 



+ 



007 



+ •006 



99 



-•014 



-•012 



-•002 



-•015 



— 



•008 



— 



007 



+ 



002 



+ 



005 



—•003 



1900 



-•004 



-•on 



+ •007 



+ •005 



— 



•008 



+ 



012 



+ 



015 



+ 



004 



+ •011 



01 



-•006 



- -009 



+ •003 



— •013 



— 



•010 



— 



003 



— 



006 





000 



—•006 



02 



-•007 



-•006 



-•001 



-•004 



— 



•010 



~. _L. 



006 



_ 



003 



— 



004 



+ •001 



03 



-•012 



-•008 



-•004 



-•020 



— 



•009 



— 



012 



_ 



007 



— 



007 



000 



04 



-•002 



-•008 



+ •006 



-•016 



— 



•007 



— 



•009 



-•01 



— 



009 



—■010 



05 



-•012 



-•004 



-•008 



+ •008 



— 



•005 



+ 



•012 





000 



— 



007 



+ •007 



nences, as can be seen by comparing the lowest lines of Table 

 III with lowest line but one in Table IT. 



Separation of the annual numbers into two groups, (_?) the long- 

 period variations as in 11 years, and (2) the short-period vari- 

 ations as in S years. 



In order to exhibit the annual and secular variations of these 

 data, the annual numbers have been separated into two groups, 

 by the following simple process : Since the short period is 

 evidently of 3 years duration, and the long period of 11 years, 

 as can be seen by an inspection, the means of successive groups 

 of five years, as 1873-1877 inclusive, 1874-1878, 1875-1879 



were taken out, and these are entered in the column 



M, against the middle year of the group in every case, as 1873- 

 1877 against 1875, 1874-1878 against 1876, 1875-1879 against 



