OF THE ATMOSPHERIC TEMPERATURE. 



199 



deviations are noted in each, the probability of their being real and not accidental 

 would be much strengthened. 



At Providence, for any day in the winter, a deviation of 20° (or of three times 

 the probable error [e] assigned), either in excess or defect of the normal tempera- 

 ture of that day, is a limit which is but rarely surpassed, and for any day in summer 

 this limit becomes 10°. At Washington, Arkansas, these limits must be changed 

 to 25° in winter, and to 6° in summer. 



As a specimen of a table exhibiting the extreme heat and cold experienced, 

 during a number of years, on the same. calendar day, the following table is given 

 from Dr. Wilson's paper, 20th Annual Report of the Regents of the University, 

 State of New York (Albany), for 1868. 



Day of 

 Month. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. S 



:pt. 



Oct. 



Nov. Dec. 







Geneva, 



New York 



Lat. 



42° 52'. 



Long 



77° 02 



' W. of G. 













Alt. 567 



feet. 



<"rom 12 years of observations ; 1854 



to 1865, 



inclusive. 









I 



51° 



5° 



50° 



— 2° 



53° 



13° 



61° 



11° 



.,• 



39°;75° 



46° 



86° 



55° 



90° 



56° 



83° 



50° 



69° 



40° 



73° 



34° 



59° 



12 



2 



41 



— 2 



41 



3 



53 



7 



65 



21 



69 



31 '84 



50 



84 



49 



89 



59 



81 



46 



68 



39 



68 



31 



54 



14 



3 



41 



6 



35 



—5 



57 



5 



65 



25 



68 



36 



So 



50 



88 



49 



86 



57 



82 



46 



80 



44 



62 



34 



59 



12 



4 



52 



7 



36 



—6 



57 



6 



61 



28 



67 



34 



87 



38 



84 



32 



92 



62 



82 



47 



79' 



42 



69 



23 



54 



II 



5 



53 



6 



42 



— I 



57 



—I 



68 



23 



78 



40 



84 



44 



87 



52 



84 



61 



87 



50 



82 



40 



72 



20 



48 



8 



6 



42 



7 



53 



—19 



41 



10 



54 



22 



80 



33 



86 



48 



88 



54 



84 



62 



81 



49 



74 



36 



62 



24 



53 



12 



7 



46 



S 



55- 



—12 



58 



4 



61 



27 



84 



31 



86 



47 



88 



55 



90 



57 



88 



56 



79 



36 



58 



22 



53 



8 



8 



42 



— I 



39 



—9 



51 



5 



63 



25 



81 



35 



78 



49 



87 



57 



88 



58 



89 



52 



85 



35 



58 



22 



61 



4 



9 



41 



—8 



46 



II 



48 - 



—4 



68 



26 



73 



40 



82 



46 



89 



58 



89 



58 



88 



47 



75 



34 



65 



29 



51 



14 



lO 



46- 



-16 



44 



4 



49 - 



-5 



55 



31 



77 



41 



85 



47 



90 



62 



90 



59 



87 



47 



74 



38 



58 



28 



64 



II 



II 



53 



5 



51 



3 



54 



13 



72 



29 



69 



30 



86 



41 



90 



57 



90 



58 



86 



53 



76 



41 



59 



27 



54 



13 



12 



65 



2 



51 



— 2 



53 



10 



66 



32 



78 



36 



83 



46 



91 



56 



86 



60 



87 



44 



68 



37 



58 



26 



47 



9 



13 



43 



6 



42 



—6 



64 



8 



63 



22 



75 



39 



79 



50 



90 



55 



92 



58 



84 



5? 



63 



33 



55 



22 



47 



12 



14 



42 



5 



42 



— I 



54 



15 



62 



27 



74 



39 



79 



54 



89 



59 



90 



55 



77 



46 



65 



34 



57 



20 



58 



7 



IS 



44 



6 



56 



5 



56 



4 



62 



26 



82 



46 



87 



54 



88 



60 



82 



56 



86 



37 



70 



29 



50 



22 



54 



5 



16 



46 







46 



8 



60 



16 



67 



32 



84 



39 



80 



46 



90 



58 



84 



55 



82 



52 



66 



30 



48 



27 



58 



15 



17 



40 



I 



56 



—I 



59 



8 



75 



30 



84 



36 



81 



50 



97 



56 



84 



54 



85 



48 



77 



35 



58 



26 



45 



8 



18 



39- 



-15 



47 



2 



60 



8 



74 



31 



82 



37 



89 



48 



91 



58 



86 



52 



90 



48 



73 



37 



56 



29 



49 



—5 



19 



42 



2 



46 



—I 



54 



6 



64 



35 



68 



44 



87 



53 



91 



63 



85 



50 



78 



41 



74 



31 



63 



28 



46 



6 



20 



54 







44 



12 



63 



11 



67 



32 



75 



41 



88 



54 



92 



61 



88 



54 



86 



37 



70 



30 



45 



20 



45 



5 



21 



51 



10 



48 



9 



72 



10 



64 



34 



82 



43 



87 



55 



89 



56 



85 



57 



76 



48 



70 



29 



48 



23 



40 



14 



22 



43 



— S 



49 



4 



50 



15 



79 



34 



84 



44 



88 



55 



82 



56 



86 



53 



78 



41 



63 



33 



52 



24 



37 



I 



23 



51 



— I 



52 



7 



52 



15 



66 



32 



85 



45 



86 



54 



84 



58 



79 



50 



78 



40 



57 



36 



50 



23 



44 



7 



24 



48 



6 



59 



8 



49 



12 



77 



32 



85 



42 



85 



57 



85 



54 



06 



52 



75 



45 



65 



32 



57 



19 



40 



9 



25 



50 



I 



45 



7 



56 



16 



70 



31 



85 



43 



91 



55 



90 



60 



82 



53 



74 



42 



65 



32 



47 



10 



52 



12 



26 



52 



5 



49 



10 



SI 



19 



72 



32 



84 



44 



88 



62 



91 



62 



86 



52 



74 



41 



63 



28 



44 



20 



50 



10 



27 



54 



3 



60 



10 



52 



19 



76 



30 



80 



48 



86 



60 



87 



57 



75 



51 



79 



41 



69 



28 



47 



20 



44 







28 



40 



6 



51 



II 



61 



13 



78 



30 



82 



44 



89 



54 



88 



61 



80 



53 



76 



45 



66 



30 



46 



23 



44 



2 



29 



39 



17 



50 



15 



59 



17 



69 



33 



83 



40 



94 



56 



87 



62 



78 



55 



71 



34 



71 



34 



59 



18 



46 



—5 



30 



41 



7 







68 



iS 



68 



37 



80 



39 



90 



52 



86 



55 



80 



48 



74 



34 



72 



33 



60 



20 



38 



10 



31 



38 



—8 







70 



16 







82 



40 







91 



53 



76 



48 







72 







__ 



39 



3 



Ineqimlity in the epoch of the anm(,al fluctuation of the temperature. 



A secular inequality in the law of the annual distribution of the temperature 

 has lately been noticed by Mr. Kingston, director of the Toronto observatory, who 

 stated that about the end of 1868, it was noticed that the normals given in General 

 Sabine's paper (Phil. Trans, vol. 143, 1853), derived from 12 years of observations 

 at Toronto, between 1841 and 1852, were wholly inapplicable to observations of 

 recent years, and that a new set of normals had been prepared in consequence, using 

 the records for ten years between 1859 and 1868 and Bessel's interpolation formula. 



