130 



TABLES OF MEAN TEMPERATURES. 





Moha-wk. — Continued. 





N. B. In the following means the preceding months marked thus *, are omitted. 



Houi 





Mar. 



May. 



July. 



Aug. 





Mar. 



May. 



July. 



Aug. 







5 years. 



5 years. 



5 years. 



5 years. 



Hour. 



5 years. 



5 years. 



5 years. 



5 years. 



Mdn't 



26°. 56 



5i°-23 



62°. 26 



63°-34 



Noon 



3l°-84 



59°-94 



72°. 60 



73°.i8 



I 





25-74 



50.09 



61.42 



62.86 



1 



32-84 



61. 28 



73-47 



74.60 



2 





25-31 



49.20 



60.57 



62.17 



2 



33 



67 



62.43 



73-72 



75-37 



3 





24-74 



48.38 



59-87 



61.47 



3 



33 



85 



63-03 



73-90 



75-98 



4 





24.26 



47-56 



59-24 



60.83 



4 



33 



70 



63-17 



73-50 



75-98 



5 





23.82 



47.08 



58-73 



60.33 



5 



33 



Ob 



62.79 



73.16 



75-36 



6 





23-38 



47-05 



59.19 



60.19 



6 



31 



79 



61.72 



71.98 



74.06 



7 





23.40 



48.56 



61.17 



61.36 



7 



30 



33 



59-52 



70.15 



71-56 



8 





24.78 



50-93 



63-79 



63.62 



8 



29 



40 



56.73 



67.51 



68.75 



9 





26.76 



53-53 



66.53 



66.22 



9 



2S 



66 



54-65 



65.42 



66.81 



\ 10 





28.75 



55-95 



69.12 



68.98 



10 



28 



03 



53-27 



64.04 



65-37 



II 



N. B. 





30.38 



58.10 



71.12 



71-31 



II 



27-37 



52.20 



63.11 



64.30 



Theob 





Mean 



28.44 



54-93 



66.4-8 



67.66 



erver remarks that the indications of the instrument are absolutely correct, but that its exposure was 1 



not une 



xceptionable ; the locality, though in the shade and on the north side of the house, being accessible to the 1 



influence of the sun between 2^ or 3 P. M., and sunset or to within half an hour previous to sunset. In 1865 the 



station was movable to avoid this influence, in 1866-7 it was tolerably free from disturbance, in the winter 1868-9 a 



screen was erected to the westward. I have omitted the results in all months marked *, considering the indications 



affected from the above cause. [S.] 



Hour. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 1 Oct. 



Nov. 



Dec. 



Year. 





Bl-HOURLY MEANS OF TEMPERATURE. 





Cambridge,' Mass. Lat. 42° 23'. Long. 71° 07' W. of G. 





Alt. about 71 ft. Observer 





Oct. 1841, to Dec. 1842, inclusive. 1 





0.6^ 



27°.92 



34°, 21 



33°-02 



39°-4i 



46°.93 



54°- 65 



66°. 00 



61°. 20 



49°. 90 



39°. 66 



33°-i3 



29°. 2 



2 42°.94 



2.6 



27-31 



32-94 



31-79 



39-76 



45-67 



52.68 



64.79 



60.35 



48.49 



38-40 



32-77 



28.75 



41-97 



4.6 



26.97 



32.01 



31-48 



38.24 



45 



06 



52 



60 



64-93 



59-50 



48.17 



37 



90 



32 



.41 



28.66 



41 



49 



6.6 



25.71 



32-lS 



30-59 



38.93 



49 



bi 



59 



74 



68.24 



62.11 



47-81 



37 



75 



32 



-27 



28.24 



42 



7b 



8.6 



23.90 



32-54 



37-09 



43-31 



57 



04 



65 



09 



73-56 



68.00 



56-44 



43 



15 



35 



■37 



29.48 



47 



08 



10.6 



29.30 



36.42 



42.41 



46.55 



60 



52 



68 



95 



78.48 



71-95 



63-45 



51 



33 



41 



•51 



33-85 



52 



Ob 



o-6^ 



33-24 



40.40 



45.04 



48.22 



63 



08 



71 



18 



79-03 



72.72 



66.10 



55 



07 



43 



.6b 



36-57 



54 



53 



2.6 



33-27 



40.99 



44-51 



48.52 



63 



98 



71 



49 



78.49 



73-01 



66.04 



55 



91 



43 



.69 



36.33 



54 



09 



4.6 



31.76 



38-87 



42.11 



47.01 



62 



51 



69 



33 



76.64 



71.79 



63.28 



52 



2V, 



4<- 



•58 



33-33 



52 



4b 



6.6 



29-55 



35-13 



37-77 



44-31 



58 



n 



66 



54 



72.45 



68.39 



58-09 



45 



59 



37 



.b2 



31.64 



48 



77 



8.6 



28.82 



34-58 



35-24 



41.07 



52 



40 



59 



60 



68.80 



64.40 



53-82 



42 



52 



35 



.67 



30.58 



45 



62 



10.6 



28.13 



34-57 



33-85 



40.21 



49 



40 



56 



oS 



67.00 



62.86 



51-30 



40.82 



34-57 



29.61 



44-03 



Mean 



28.82 



35-40 



37-07 



42.96 



54-53 



62.33 



71-53 



66.36 



56,07 



45-03 



35-94 



31-35 



47-37 



No. of) 

 days S 



It is 



13 



10 



14 



15 



14 



11 



10 



II 



II 



IS 





JO 



23 





apparen 



t that the small number of observations is the principal cause of certain anom 



alies presented in the 1 



above e 



aeans. 1 



1 



Mem 



oirs 



Am. Ac 



ad., vol 



» 



new 



seri 



ss 





ilso 



Tran 



s. Conn 



Acad. 



of Arts a 



nd i 



5ci., 



vol 



'. P 



art I, I 



866. 





