558 {Nov..1 
Ay 
Chase. } 
LUNAR-=CYCLICAL RAINFALL IN THE NORTHERN TEM- 
PERATE ZONE, 
By Pirny Earue Case, 
(Read before the American Philosophical Society, Nov. 1, 1872.) 
My discussions of lunar-monthly vainfall, (ante, x., 489, 538 ; xii, 208"; 
xii., 179, 523,) embracing observations in Europe, Asiaand America, near 
eastern and western shores of oceans, in regions of monsoons and return 
" trade-winds, near equatorial and polar currents, seem to be sufficiently 
varied in their character to justify a first approximation to the normal 
curve for the Northern Temperate Zone. The stations are so well dis- 
tributed that the influence of local “establishments”? must be, to a great 
extent, eliminated, and it seems reasonable to presume that the residuals. 
represent, with some degree of accuracy, the precipitation which is occa- 
sioned by the lunar modifications of the average atmospheric currents. 
I.have given equal weight to the normals for each station, but as the 
Toronto observations cover only nine years, and those at Chiswick are of 
the same general character as those at Surrey, I give two complete aggre- 
gates: A., embracing stations 2 to 6 inclusive, and B., 2 to 8 inclusive ; 
and one partial aggregate, C., for all the stations. 
NORMALS OF LUNAR-MONTHLY RAINFALL 
Cy : S 
“ © eet o o fa) i 
, Dis (heed < “ A S * 
a aa Ge -e Sa 3 3 en iS a 
an) poe i mw AA g Es q : 
feo Og. aha C8 C8. )) the. oe 1 
Bi IS =} 3 vw Sey Ce : 
3 Se oe ee, oe Of nO os 6) 
x Si She Om Bee HA 2m Be ae 
aS BO HO Dae 'og i a0 BS Soiic, So 
= i 4H mo ‘mce o mt HA 
wl at ver ral qd al ~ 
} 4 rs iS 
if] 
86 93 200 104 97 104 498 104 oF 
93. 98 100 97 103 491 105 104 
96 97 98 94 98 4838 105 1038 
100-100 98 92 91 481 105 94 
10): 102° 160 96 86 485 108 92 
99 102 103 104 81 489 100 100 
97 100 107. 107 81 492 96. ke 
115. 97 101 107 = 108 85 498 OF. 1 827 
OF 105, 101 107 OL 501 102" 10 
98 107 93 «103 4 106, 98 
98 104 8T oT 116 105 91 
9%; 101 85, 9 128 103, 95 
95 98 8% =6110)=—-128 101 405 
92 OT 90 125 128 98 110 
89 98 90 18 116 98 104 
¢ 98 91 80k 
a Rd ge boa BE 85 = 104 1097 10; 
407 «#104 110 83 82 108 = =104 
B18 = 105—Ss «101 106 86, 69 101 103 T84 
105. 98 = =102 88 70. 95° 10 
102 go 99 89 We 93 108 
98 101 9m 86. 84 94 «10% 
100 100 103 81 89 94 Ol 
103 99 ©=109 85 95 95 91 
95° 101. 108 96 102.502 101 8 
Each of the complete aggregates indicates an excess of rainfall during; 
