146 TABLES OF DIFFERENCES OF MEAN TEMPERATURES. 



1 Hour. 



Jan. 



Feb. 



Mar. 



April. 



M;iy. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



Year. 



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



Alt. about 71 feet. Oct. 1841, to Dec. 1842, inclusive. 





Q 



Q 







Q 



Q 





























;, 



0.6a.m. 



— o.go 



— I. 19 



—4.05 



— 3-SS 



— 7.60 



—7.68 



—5-53 



—5.16 



— 6.17 



— 5-37 



—3.81 



—2.13 



—4.43 



2.6 



—1. 51 



■ 2.46 



— S 



28 



— 3.20 



—8.86 



—9.65 



—6.74 



— 6,01 



— 7 



58 



— 6.63 



—4.17 



— 2.60 



— 5.40 



4.6 



-1. 8s 



—3-39 



— S 



59 



—4.72 



—9-47 



—9-73 



—6.60 



—6.86 



— 7 



90 



— 7.'3 



—4-53 



— 2.69 



-5,88 



6.6 



— 3-" 



—3-25 



—6 



48 



—4-03 



—4.92 



—2-59 



—3-29 



—4.25 



— S 



26 



- 7.2S 



—4.67 



— 3- 1 1 



— 4.61 



8.6 



—4.92 



—2.86 



+0 



02 



+0-35 



4-2.51 



4-2.76 



— 2.03 



4-1.64 



4- 



37 



— 1.88 



—1.57 



-1.87 



— 0.29 



10.6 



+0.48 



+ 1.02 



+5 



34 



+3-59 



+5-99 



4-6.62 



—6.95 



+ 5.59 



4- 7 



38 



4- 6.30 



4-4-57 



4-2.50 



4-4.69 



0.6 p.m. 



+4-42 



+ 5.00 



+7 



97 



4-5.26 



+8.55 



+S.S5 



— 7.50 



4-6.36 



4-10 



03 



4-10.04 



4-6.72 



4-5.22 



-h7.i6 



2.6 



+4-45 



+S-S9 



+7 



44 



+5-56 



+9-45 



4-9.16 



—6.96 



+6.65 



+ 9 



97 



4- 10. 88 



-F6.75 



4-4.98 



4-7.32 



4.6 



+ 2.94 



+3-47 



+5 



04 



+4-05 



+ 7.9S 



4-7.00 



— 5. II 



+5-43 



4- 7 



21 



4- 7.25 



4-3.64 



4-1.98 



4-5.09 



6,6 



+0-73 



— 0.27 



+0 



70 



+ 1-35 



+3-60 



4-4.21 



4-0.92 



4-2.03 



4- 2 



02 



4- 0.56 



4-0,68 



4-0,29 



4-1.40 



8.6 



0.00 



—0.82 



— I 



83 



—1.89 



—2,13 



—2-73 



—2.73 



— 1.96 



— 2 



25 



— 2.51 



—1,27 



—0.77 



—1-75 



10.6 



— 0.69 



—0.83 



—3.22 



—2.75 



-5-13 



-6,25 



—4-53 



—3.50 



— 4.77 



— 4.21 



—2-37 



—1.74 



—3.34 



1 The following 



values for certain combinations of hours were obtained by a process of graphical ii 



terpolation, the j 



1 above monthly results having been plotted on a suitable scale for that purpose : — 1 



Comb's 

























7.2.9 



+0.3 



+O.S 



— 0.2 



4-0.1 



+0.9 +1-4 



4-0.5 



+0.3 



— 0,1 



4- 0.4 4-0,2 



+0.3 



4-0.4 



7. -• 9 Ms 



+0.2 



+0.1 



—0.7 



—0.4 



— O.I 4-0.2 



—0.4 



—0.3 



— 0.7 



— 0,4 — 0,2 



0.0 



— 0,2 



3.9.3.9 





— 0.1 



-Ho. 2 



4-0.4 



4-0.2 —0.2 



4-0.1 



4-0.4 



4- 0.5 



4- 0,2 4-0,4 



0.0 



4-0,1 



The above results are of comparatively little value on account of the small number of observations. 



Amherst, Mass. Lat. 42° 22'. Long. 72° 34' W. of G. 



Alt. 267 feet. 1839. 



Mdn't 



—2.50 



— 1.70 



-4.84 



— 4-92 



—4-75 



—5-50 



—5-32 



—4.53 



—5.39 



—3.99 



—2.39 



— i.gS 



-398 



I 



—3-90 



-2.7S 



—4.72 



— 6 



23 



— 5-Si 



—6.66 



— 6.40 



—5.15 



—5 



41 



—4.77 



— 2.33 



-1.63 



-4,62 



2 



—4.24 



—3-03 



—4.80 



— 6 



69 



—6.48 



—7-30 



—6.84 



-5.67 



—6 



17 



—5.55 



—2.98 



— 2.20 



-5,16 



3 



—4-13 



—3.20 



—5-34 



— 7 



42 



—7.41 



—7.94 



—7.29 



— 6.04 



—6 



97 



—6,36 



-3.48 



—2.55 



—5.68 



4 



—4-50 



—3-94 



— S.68 



— 7 



S5 



—7.88 



—8.06 



—7-43 



■ — 6.30 



—7 



61 



—6,99 



— 3.7« 



—2.70 



— 6,05 



5 



—4.72 



— 4.20 



—6.03 



— 8 



12 



_8.iS 



-7.82 



—7-55 



—6.67 



—7 



93 



—7.62 



— 4.02 



— 3,32 



—6,36 



6 



—4.68 



-4.78 



—6. 1 1 



— 7 



77 



-6.77 



-5.9S 



— 6.03 



-5-82 



—7 



49 



—7.55 



—4.33 



-3-78 



—5,92 



7 



—4-75 



-4.78 



— 4.61 



— 5 



97 



. — 4.22 



—4.22 



—3.81 



—4.49 



-5 



37 



-6.77 



—4.27 



—3-97 



—4.77 



8 



-3-83 



-3-78 



—2.07 



— 3 



04 



— 1.62 



—1.42 



— 1. 10 



—1,97 



— 2 



57 



— 4,21 



-2.67 



—4.13 



—2,70 



9 



— 1.46 



—1.45 



+0-47 



— - 



08 



4-0.60 



4-O.S6 



4-O.S6 



4-0,92 



4-0 



51 



—0.73 



— 0.33 



—2.40 



— 0.19 



10 



+ :-32 



+0.85 



+2.58 



+ 2 



69 



+ 3-12 



+3.IO 



+3-79 



+3.03 



4-3 



27 



-^2.34 



4-1.44 



4-0.55 



4-2.34 



II 



+4.10 



4-2.72 



+4-78 



+ S 



65 



+ 5-12 



+ 5.66 



4-6.42 



+ 5-44 



4-5 



99 



+5-12 



4-3.02 



-H2.76 



4-4.73 



Noon 



+6.32 



+4.26 



+6-39 



+ 7 



92 



+6.75 



4-8.06 



4-8.49 



4-6.85 



4-8 



II 



4-7-16 



4-5.02 



4-4.30 



4-6,64 



I 



+ 7-46 



+ 5-35 



+ 7.66 



+ 9 



46 



4-8.15 



+9-.K 



4-8.S2 



4-8,22 



4-9 



07 



4-8.34 



4-6.13 



4-6.14 



4-7.85 



2 



+ 7.80 



+6.06 



+S.35 



4- 10 



42 



+8.75 



4-8.98 



+9-49 



+ 7.85 



4-9 



75 



4-9.38 



4-5.98 



-^6,30 



4-8,26 



-. 



+ 7-32 



+5.S0 



4-S.12 



+ 9 



81 



+S.27 



4-8.58 



+ 7-49 



4-7,66 



4-9 



15 



4-9.34 



4-5.29 



4-5.60 



4-7.70 



4 



+S-80 



+4.89 



+7-24 



+ 8 



61 



4-7.86 



+ 7.82 



4-7.16 



4-6,22 



4-8 



35 



+S.34 



+3.86 



4-3.76 



4-6,66 



5 



+3-32 



4-3-IO 



+ 5-66 



+ 7 



04 



+ 5-97 



+5-98 



+ 5.82 



+5-25 



+6 



39 



4-5.75 



4-2.29 



4-2.03 



4-4.89 



6 



+ 2.06 



+ 1.18 



+3-47 



+ 4 



50 



4-4.0S 



+4.18 



4-4.16 



4-2,81 



+3 



47 



-H3.60 



4-0.86 



4-0,68 



4-2,93 



7 



— 0.24 



+ '•05 



— 0.16 



+ 1 



69 



+2.38 



4-1.90 



+ 1.53 



4-1.43 



4-1 



42 



4-1-34 



4-0.65 



4-0.31 



4-1.11 



8 



— 0.64 



+0-43 



— 0.92 



— 



27 



4-0.19 



—0.06 



—0.99 



—0,34 



— 



16 



—0.03 



—0.07 



— 0,20 



—0.25 



9 



—1.50 



—0.28 



—1.88 



— I 



77 



—1.66 



—1.98 



—3.06 



— 1.60 



— 2 



04 



. — 1.06 



—0,79 



-0,69 



—1-53 



10 



— 2.01 



—0.57 



-3-28 



— 3 



31 



—2.73 



—3.22 



—3.80 



—3.02 



— 3 



5S 



—I. So 



—1.15 



. — 1. 20 



—2.47 



II 



—2.42 



— 1.19 



—4.28 



— 4-23 



—3-99 



—4.22 



—4.25 



—3.80 



—4.66 



—3.14 



—1.95 



-1.58 



—3.31 



Comb's 





























10, 10 



—0.34 



4-O.I4 



— 0-35 



— 0.31 



4-0.19 



—0.06 



0.00 



0.00 



— 0.19 



4-0,27 



4-0.24 



-0.32 



—0,06 



6, 2,9 



+0-S4 



+0.33 



-I-0.12 



+ 0-29 



4-0.11 



+0-34 



+0.13 



4-0.14 



4-0,07 



4-0,26 



4-0.29 



4-0.61 



4-0,27 



6, 2, 10 



+°-37 



4-0.24 



—0-35 



— 0.22 



■ — 0.25 



—0.07 



— 0.1 1 



—0.33 



—0.44 



-j-o,oi 



4-0.17 



4-0,44 



— 0,04 



7.2,9 



+0-52 



+0-33 



+0.62 



-f 0.89 



4-0.96 



+0-93 



4-0.S7 



4-0.59 



4-0,78 



4-0,52 



4-0.31 



4-0,55 



4-0,65 



7.2, 9 Ms 



-j-O.OI 



-1-0.18 



0.00 



+ 0.23 



4-0.30 



4-0.20 



— 0. II 



4-0.04 



4-0.07 



4-0,12 



4-0.03 



4-0,24 



4-0. II 



3.9.3.9 



+0.06 



-j-0.22 



+0-34 



+ 0.13 



— 0.05 



— 0.12 



— 0.50 



4-0.23 



4-0.16 



4-0,30 



4-0.17 



— 0,01 



4-0,08 



1 



