OF THE ATMOSPHERIC TEMPERATURE. 



189 



Day of 



Month. 



Jan. 

 (29) 



Feb. 

 (29) 



Mar. 

 (29) 



April. 

 (29) 



May. 

 (29) 



June. 



July- 



Sept. 



Dec. 

 (29) 



Providence, Rhode Island. Lat. 41° 50'. Long. 71° 24' W. of G. 



Alt. 155 feet. 28^ years of observation; Dec. 1S31, to May, i860, inclusive. Prof. A. Caswell, observer. 

 Snpithsonian Cont. to Knowl. Washington, i860. 





^ 



^ 



















^ 







28.3 



24.6 



29.8 



41.0 



51-7 



59°S 



69.7 



70.4 



65.4 



25.9 



24.6 



29.0 



39 



5 



51.6 



62 



4 



69.7 



70.4 



65.6 



25-3 



24.8 



27.5 



41 



6 



52.1 



63 



9 



69.0 



70.0 



67.2 



26.2 



23.8 



29.2 



42 



6 



52.0 



63 



2 



69.9 



69.9 



67.7 



26.4 



24.7 



30-4 



42 





51-3 



62 



3 



70.4 



71. 1 



67. 8 



26.4 



24.7 



32-S 



43 





53-4 



62 



2 



67.6 



71.0 



67.2 



28.1 



25.8 



32.1 



43 





53-5 



61 



9 



67.5 



70.7 



65.9 



27.1 



26,0 



34-0 



44 





53-1 



63 



I 



71-3 



70.8 



64.5 



27.3 



26.0 



34-8 



4S 





53-7 



64 



3 



71.2 



71.2 



65.6 



27.7 



25.4 



33-6 



44 





52-9 



65 



2 



71-3 



69.7 



63-7 



27.S 



25-9 



32-7 



44 





5|'7 



63 



9 



71.2 



69,7 



65.0 



27.5 



23-9 



33-3 



45 





56.3 



63 



2 



71.2 



71.2 



63.0 



27.4 



24.0 



36.4 



44 





55-8 



64 



5 



71.9 



72.1 



60.7 



28.2 



26.4 



34-3 



42 



4 



55-5 



65 



S 



72.1 



71.8 



59-4 



29.4 



27.1 



34-5 



42 





55-7 



65 



6 



71.9 



69.5 



61.3 



29-5 



28.0 



34-4 



43 







57-5 



65 



6 



70,0 



68.5 



60.3 



29.6 



25-5 



36.1 



43 



8 



58.2 



65 



6 



71.6 



68.3 



60.5 



25-5 



25-5 



36.2 



44 



2 



58.1 



65 



8 



72.7 



68.3 



63-4 



233 



27.4 



35-5 



45 





58.5 



67 



I 



72.8 



68.1 



62.7 



26.3 



30.2 



37-0 



45 



8 



57.0 



67 







72.2 



67.4 



63.2 



29.6 



3I.I 



38.1 



47 



3 



57-1 



67 



9 



72-3 



67.9 



61.6 



25.2 



32.5 



34-8. 



49 







5°-4 



67 







72-3 



68.8 



57.6 



239 



32.3 



35-0 



48 



4 



58.2 



67 



8 



71.9 



68.4 



57-0 



26.2 



28.7 



37-0 



48 



5 



58.2 



68 







72.2 



68.8 



57.6 



•28.5 



27.8 



37-2 



47 



5 



57-4 



68 



3 



72.1 



67.9 



58.0 



29.6 



28.4 



37-7 



50 





58-4 



68 



5 



72.1 



66.7 



57-4 



26.8 



29.6 



39-7 



49 



9 



58.3 



69 







70.8 



67.4 



57-4 



26.5 



29.6 



39-7 



49 



I 



60.8 



69 



■7 



70-3 



66.4 



57-4 



27.7 



32-4 



39-1 



50 



•7 



59-0 



70 



•4 



70.7 



66.1 



55-4 



29.1 





39-7 



51 



.1 



56.8 



70 



•3 



71.0 



66.7 



S5-4 



26.5 





40.9 







56-4 







71.0 



67-3 





56. 5 

 57.<5 

 54-5 

 53-7 

 53-6 

 54.6 

 52.9 

 54- o 

 54.2 

 527 

 52.2 

 54.0 



53-5 

 SO. I 

 48.7 

 50.7 

 52.0 



53-9 

 52.S 



49-5 

 47-5 

 48.9 

 49.1 



49-3 

 46.9 



44-3 

 45-8 

 45-3 

 46.6 



47-5 

 44.8 



44-7 

 46.6 

 45.8 

 45-8 

 45.2 



43-3 

 42.8 

 44.1 



44-3 

 41.6 

 40.6 

 42.4 

 42.4 

 40-3 

 38-3 

 39-7 

 40.2 

 42.1 

 40.2 

 37-3 

 37-2 

 39-4 

 39-5 

 36.6 

 34-2 

 34-2 

 32-7 

 32.6 

 33-0 

 34-8 



33-5 

 .33-1 

 34-1 

 33-3 

 32.2 

 31-2 

 32-4 

 32.7 

 323 

 330 



31-3 



29.4 

 28.6 

 30-7 

 309 

 28.3 

 28.9 

 26.4 

 26.4 

 27.6 

 26.9 

 25-4 

 25-5 

 26.7 

 27.7 

 26.8 

 24,9 

 27.5 

 27.4 

 26.4 

 27.7 



Observing hours various, generally 0,., i„ or 2^, 10^, from Oct. to March, inclusive, and 6^, l^ or 2^, lo^, in the 

 remaining months. The tabular quantities are corrected for daily fluctuation. 



To correct the observed daily means resulting from three observations a day, taken at various hours, the following 

 table was prepared and used : — 



January 



February 



March 



April 



May 



June 



July 



August 



September 



October 



November 



December 



0. 



O, 

 0, 

 0. 

 O. 



+0.1 

 +O.S 

 +0.5 

 + 1.2 

 +0.5 



+ I.O 



+0.9 

 +0.7 

 +0.4 

 — 0.1 

 — 0.2 







Q 



0, 



, 10 



O.I 



0, 



, 10 



+0.1 



0. 



, 10 



+0.4 



0. 



> 10 



+0.8 



6, 



I 10 



+0.7 



5, 

 0. 



, 10 r 



+;:•! 



5. 



, 10 



+0.9 



6, 



, 10 



+0.6 



6, 



, 10 



+0.7 



6, 



, 10 



+0.4 



7, 



. 9 



— 0-3 



0,2, 

 0,2, 



10 

 10 



0.0 



6,2, 



10 



+0.3 



6, I, 



10 



+O.S 



6, 2, 



10 



+0.5 



6, 2, 



10 



+0-3 



6, I, 



5, I. 



6, 2, 



0,2, 

 0,2, 



10 

 10 

 10 

 10 

 10 



+0.5 

 +0.5 

 +0.5 



+0.3 

 — 0.1 



0,2, 



10 



— 0-3 



0, 2, 10 



6, 2, 10 ( 



0,2, 10 J 



6, 2, 10 

 6, 2, 10 



+0.2 



0.6 i 

 +0.6 f 



+0.4 

 +O.S 



The above corrections apply to the middle of each month, and were interpolated for every day. 



