188 



discussiojSI of the annual fluctuation 



I Day of 

 Month. 



Jan. 



May. 



June. 



July- 



Sept. 



Salem. — Continued. 



Q 



















(, 











^ 











1 



25-3 



31.0 



37-3 



47-7 



58.8 



68.4 



71.9 



696 



608 



48.6 



37-.'; 1 



23.8 



30 



4 



3b 



5 



46 



3 



60.4 



68.6 



72 



6 



69 



S 



■;8 



I 



47 



7 



^6 



s 



23-4 



27 



7 



3ii 



3 



48 



I 



61. 1 



70.6 



74 







68 



8 



S8 



7 



44 



9 



3'; 



7 



24.6 



29 



8 



3S 



4 



47 



8 



62.4 



71.7 



74 



2 



68 



4 



s« 



S 



4'; 



2 



ss 



8 



23.1 



28 



8 



3S 



9 



48 



4 



61.1 



71-5 



73 



5 



69 



3 



s« 



7 



43 



7 



34 



3 



24.4 



29 



I 



3« 



I 



50 



4 



61.4 



69.2 



72 



2 



68 



9 



S7 



S 



46 



8 



33 



2 



25.4 



.so 







3« 







.SO 



2 



60.2 



70.3 



72 



4 



68 



6 



S7 



2 



44 



I 



3S 



7 



27-5 



30 



9 



39 



I 



49 



5 



61.6 



71.8 



72 



5 



68 



3 



S6 



8 



4'5 



6 



3'; 







26.0 



3° 



■i 



3S 



4 



50 



.S 



62.9 



72.6 



73 



I 



69 



3 



S6 



4 



44 



9 



3S 



7 



24.7 





3S 



5 



52 



3 



63.1 



72.4 



72 



9 



68 



7 



56 



S 



43 



■; 



36 







24.1 







39-9 





61. s 





74.0 



67.4 





41 



7 







27.9 



26.3 



26.6 



28.5 



26.3 



26.8 

 28.4 

 29.5 

 31.0 



28. s 



29.9 



Observations at 8 A. M. Tabular numbers corrected for daily fluctuation. 



To correct the table of temperatures observed at 8 A. M., for daily fluctuation, two sets of corrections vi^ere applied; 

 first, the observed means were referred to the means from observations at 8 A. M. , Noon, sunset, and 10 P. M., taken 

 at Salem from a 10 year series between 1819 and 1828, inclusive; secondly, the means so corrected were referred to 

 the daily mean by means of the Amherst table. The two sets of corrections and their sum are as follows : — 





I. 



II. 



I&II. 





I. 



II. 



I &II. 







^ 









Q 



^ 



January 



+4.52 



—0.89 



+3-63 



July 



+2.26 



— 0.96 



+ 1-3° 



February 



+4.48 



—0.47 



+4-OI 



August 



+ 2.51 



— 0.82 



+ 1.69 



March 



+3-52 



— 0.91 



+2.61 



September 



+3-49 



— 1. 25 



+2.24 



April 



+2-49 



—1.03 



+ 1.46 



October 



+4-54 



—1.62 



+2.92 



May 



+ 1-94 



—0.98 



+0.96 



November 



+3-57 



—1.03 



+2.54 



June 



+ 1.70 



—0.99 



+0.71 



December 



+4.16 



-0.46 



+3-7° 



The above correctio 



ns refer to the middle of each month, and by interpolation they were found for each day. 





Williamsto-wn, Mass. Lat. 42° 43'. Long. 73° 13' W. of G. 



Alt. 721 feet. 23 yeai-s of observation; from 1816 to 1838, inclusive. Prof. C. Dewey and Prof. E. Kellogg 



MS. in Smithsonian Coll. 



25.8 



16.1 



26.2 



38.6 



54-9 



63 



9 



70.4 



69 



9 



62. 5 



53 



S 



40.7 



22.8 



18.9 



24.8 



38.6 



53-9 



64 



■^ 



70.4 



69 



3 



62.8 



.S4 



8 



40.5 



22.0 



20.7 



23-9 



39-8 



54-4 



63 



3 



68.8 



69 



S 



63.6 



52 



9 



39-7 



22.1 



19-5 



25-5 



39-2 



52.9 



65 



I 



69.7 



68 



4 



64.6 



5° 



4 



41.4 



23.2 



14.8 



29,6 



40-3 



51.6 



6S 



4 



70.3 



67 



7 



64.4 



.S2 



9 



41-3 



22.9 



17.6 



30.8 



40.6 



54- 1 



63 



4 



70.7 



67 



4 



63.6 



52 







37-9 



21. S 



21.7 



28.6 



42.0 



52.3 



67 



4 



72.0 



69 



3 



61.7 



SO 



7 



40.1 



22.7 



21.2 



28.3 



42.8 



5t.6 



6S 



7 



71. 1 



69 



6 



61.4 



.SO 







40. 1 



23-9 



21.3 



29.2 



41.5 



49-3 



66 







70-3 



68 







62.0 



52 







39-1 



23.1 



24.5 



31.0 



41.4 



51-7 



64 



7 



70.0 



69 







61.2 



SO 



5 



40.0 



19.4 



22.5 



31-9 



41-3 



53-3 



66 



6 



70.9 



70 







61. 5 



49 



5 



39-3 



22.4 



21.7 



33-1 



41.0 



56.0 



66 



8 



70-5 



70 



9 



59-8 



47 



9 



39-0 



24.0 



21.2 



33-6 



41.6 



55-0 



66 







69.0 



69 



I 



59- S 



47 



8 



34-3 



18.8 



20.3 



30-3 



43-9 



54-3 



6S 



9 



69.1 



68 



S 



59-7 



46 



7 



35-8 



21.4 



21.7 



29.8 



43-5 



55.6 



6S 



9 



69.2 



67 



4 



58.6 



46 



4 



35-2 



22.5 



22.4 



30.1 



44.6 



56.2 



66 



8 



69.1 



66 



6 



57-7 



48 



2 



36-4 



24-3 



22.9 



2g.o 



43-9 



57-4 



66 



7 



68.6 



66 



7 



58.4 



47 







38.2 



24.9 



23-9 



29.7 



43- S 



59-3 



66 



3 



69.2 



67 



I 



59.2 



48 







36.3 



23.2 



23-3 



30.1 



44-7 



5S.6 



6S 



9 



70.3 



66 



9 



58.1 



46 



7 



35-3 



20.5 



27.9 



33-8 



46.8 



59-0 



6S 



9 



70.8 



66 



9 



57-9 



46 



9 ' 



3S-4 



20.3 



30.6 



31.8 



47.1 



61.0 



66 



2 



69.5 



66 



7 



56.7 



44 



9 



35-0 



20.7 



29.0 



32.2 



44.1 



61.2 



66 



2 



69.6 



66 



2 



SS-3 



43 



4 



35-° 



18.7 



26.5 



35-4 



46.2 



59-3 



66 



4 



70. S 



69 



7 



55.0 



46 



3 



33-7 



17.9 



23-7 



37-9 



43-3 



59-7 



67 



I 



70.3 



63 



8 



55-2 



4S 







29.9 



18.1 



24.8 



37-7 



46.2 



59.6 



66 



4 



69.2 



63 



6 



55-4 



40 



3 



29.1 



23.0 



24.6 



35-3 



48.9 



58.1 



67 







68.0 



64 



7 



S4.0 



40 



9 



30.0 



23-3 



27-5 



35-5 



46.8 



60.1 



67 



I 



68.9 



63 



8 



55-6 



41 



9 



29-3 



24.0 



24.4 



36.7 



47- S 



62.7 



67 



3 



69.6 



62 



7 



54.2 



40 



3 



30.0 



20.6 



26.7 



34- S 



Si-6 



60.7 



67 





70.5 



62 



6 



63.0 



39 



9 



31-4 



19.8 





35-5 



51-5 



60.5 



70 







71-3 



69 



3 



51.8 



39 



9 



32.0 



20.8 





37-7 





62.5 







70.5 



64 



9 





39 



7 





316 



30.8 



29-3 

 28.5 



28.0 

 28.5 

 29.8 



30.0 



29.0 

 25-9 

 27-3 

 27.1 

 25.4 



26.7 



25-5 

 19.4 



22.8 

 26.9 

 26.7 

 26.0 

 22.7 

 17.8 



17-5 

 24.4 

 26.7 

 24,0 

 22.2 

 23.0 

 25.2 

 22.1 

 28.0 



4 



Observing hours 7^, 2^, g^. Tabular quantities uncorrected for daily fluctuation. 



