198 



Meteorology of New Haven. 



obtain all the information which could be derived from hourly obser- 

 vations made at stations nearest to us, and not differing greatly in 

 the character of their climate. The stations chosen for this purjiose 

 are Philadelphia on the southwest side of New Haven, and Amherst 

 and Cambridge on the northeast side. The corrections for Philadel- 

 phia, as deduced from the Girard College observations, are given by 

 Prof. Guyot in his Meteorological Tables, p. 16. The corrections de- 

 duced by Prof Dove from the observations at Frankford Arsenal are 

 given by Prof Guyot in his Tables, jx 18. The corrections deduced 

 from observations at Amherst College are given in Guyot's Meteoro- 

 logical Tables, p. 28. The hoiirly observations at Cambridge were 

 published in the Memoirs of the American Academy, vol. ii, ncAV 

 series, pp. 89 to 134. They extend from Oct. 26, 1841, to Dec. 23, 

 1842. No reduction of these observations has hitherto been piib- 

 lished. The committee have deduced from these observations the 

 following table, showing the mean temperature of each month of the 

 year, at intervals of two hours. 



Cambridge Mean temperatures. 



Hour. 



h 

 A.M. 0-6 



2-6 

 4-6 

 6-6 

 8-6 

 IO-6 

 p. M. o 6 



2-6 



4-6 



66 



8-6 



10 6 



Jan. Feb. March. April. May. June. July. Aug. Sept. Oct. 



Mt-an, 

 No. (lays, 



27-92 34' 2 1 

 27-31 32*94 

 26*9732 01 

 25-71 32-i5 

 23-90 32-54 

 29-30 36 43 

 33 2440-40 

 33 2740 99 

 31-7638-87 

 29-55 35- 1 3 

 288234-58 

 28- 1 3 34-57 

 28-8235^0 

 i3 I 10 



33 o3;39 4i 

 31-79 ^9 7^ 

 3i-48|38-24 

 3o-59'38-93 

 37 oy 43-3i 

 42-4i!46-55 



45 04 48-2 2 



44-5i|48-52 

 42-t it47"Oi 

 37-77J44 3i 

 35-24!4i-o7 

 33-85J4o-2i 



37 07 42-96 

 i4 ' i5 I 



46-93 54 

 45 6752 

 45o6 5-A 

 49 61 59 

 5704 65 

 60 52 68 

 63-0871 

 63-9871 

 6'>-5i 69- 

 58-13 66 

 52-4059 

 49'4oi56 

 54T3|6i" 

 i4 I T 



65 66-00 

 68 64 79 

 60 64-93 

 74 68 24 

 09 73-56 

 95 78-48 

 18 79 o3 

 49 78-49 

 33 76 64 

 5472-45 

 60 68-80 

 08 67-00 



T3'^3 

 I 1 10 



6f20 



60-35 



59 5o 

 62-1 1 

 68-00 

 71-95 

 72-72 

 73-01 

 71-79 

 68-39 

 64-40 

 62-86: 

 66-36! 



49-90 39-66 



48-49^38 40 

 48 17 37-90 

 4781 37-75 

 56 44 43-15 

 63-4551-33 

 66-10 55 07 

 66-o4i55-9i 

 63-2852-28 

 58o9'45 59' 

 5382I42-52 

 5 1 -3o 40-82 



56 07'45-o3 

 II 1 i5 



33 i3 

 32-77 

 32-41 

 32-27 

 35-37 

 4i-5i 

 43-66 

 43-69 

 4o-58 

 37-62 

 35-67 

 34^7 

 36-94 

 3o 



Dec. 



29-22 

 28-75 

 28-66 

 28 24 

 29-48 

 33-85 

 36-57 

 36-33 

 33-33 

 3 1-64 

 3o-58 

 9-6, 



3! -35 



23 



Year 



42-94 

 41-97 



4i-49 



42-76 

 47-08 

 52 06 

 54-53 

 54-69 

 52-46 



48-77 

 45 62 

 44-o3 

 47-37 



From this table we have deduced the folloAving showing the 



Corrections to be ap2)lied to the means of the hours of observation to 

 obtain the true mean temperatures of the months and of the year at 

 Cambridge. 



