United States Weather Maps for 1872-1874. ll 
1878, is 16, which is 40 per cent of the whole number of sta- 
tions; and among the stations at which so great a difference 
was not observed, are Kingston, Toronto and Montreal, in 
Canada, and the summit of Mount Washington in New Hamp- 
shire. 
In the Report of the Chief Signal Officer for 1874 is given 
the maximum and minimum temperature of each day in 1874 
at 107 stations in the United States and Canada. The follow- 
ing table shows all the cases in which the difference between 
oo maximum and minimum of the same day amounted to at 
east 40°. 
Diurnal Change of Temperature of 40° and upwards in 1874. 
. | | 
dl. «bg nae 
Lat.| Lon. | §}< PEleigisisidive gs g 
SPSS sislqidoaar 
Fe _ 
Colorado Springs|38 55/164 58) 8| 3| 4 3/11).9| 8)..|..| * 2, 8 5¢ 
DSNVOr. 2 uk. 39 4) 21 1] 1] 4} 6] 6 4] 1] Si U7 4) 146 
heyenne 41 12104 43 6} 5| 7 4| 6] 2| 3| 133 
Fort Sully __.-_ 44 39'100 40, 5] 1] 2] 4! 1/-_| 1/_.| 5} 3} 2/--'24 
Breckenridge __|46 11] 96 17} 1| 4! 1'..| 3| 1/--|_.| 4| 1) 1) 315 
n 43 45] 97 30) 4) 1.2) 9.) }-.|..] 4) 8} 1-0 
Geney; Ao 631 9) Bb Qi ah ibs sl oak pies Ole 
s o ...|29 25] 98 25] 3] 1/__| 5 11¢ 
Pembina 2. O81 Bia.) Td) Bll) AE hic 4 
Fort Garry 49 52| 96 58|_.| 2]--| a] 1/__}_.|_.|-_] 2) 1!-.| 
Stayner __... 2. $6) 8015) Biosig Arde Sh do See a caer 
Fort Gibson _.__/35 43] 95 16] 1 1 1 t 
Chatham ______ 65 30/__| 2| 2 --| 4 
lalifax 40] 63 36]__| 1] 1 li: 
1a Crosse__..__ Ao 48: 91 Ssh) Gr tala 
forgantown .../39 36) 79 52|_.|_.|__| 1 2)--|--| 
Leavenworth 39 19! 94 5 ac:% 
Mt. Washington 16; 71 16} 2 Se 
Oawe 22550 45 22) %5 46 11 | 4 
PONT so 4616160) Sool Hop Basha Mle 
Vytheville.____ 36 56] 81 0} * * # * i | al al ee 
en 42 40] 73 45) Hie 1 Sone Bee Sa esl A ea gl 
Buta 42 53| 78 55\__| 1 | 
urlington.____ 44 29] 73 1 | 1 
Charleston _____ 32 45) 79 5 RAGES ee 
Davenport 32) 90 38 5 
ute 46 481 99 9] # ee el yl tt] ee 
astport -_.___ 55) 66 54) 1 tg ed 
PP csmew ex 43% 80-10) Bh tl 
seh L 12) 76 4 is 1 
lew London ._.'41 22) 72 9| *, #__/__| 1/__|__|_i__| #) # * 
forfolk .___.__ 36 51) 76 1s eee Oe Maes ted PE 
maha -.__._. 41 16) 96 0| 1). ac ere 
Portland, Oreg._ 46 30/122 27| * *| * BE Ss 
ort Stanley ___42 40, 81 13| # # *# *_.| 1 __\__|__| *) * #1] 
jaugeen _...._/42 40| 81 16|..| bBoccht Mest 
Squan Beach...40 8! 74 1) * * ae bed ade ee 
Saint Louis ..__ 38 37| 90 15] 1. ] 
