METEOROLOGICAL SUMMARY FOR THE YEAR 788o. 633 
During the year, three observations daily, the wind was from the sw. 324 
ines Wenn 242m times) "See TGoN timen a s\. Elsi times ime Log) times 6.1 OF 
times; n., 55 times; w., 37 times; calm, once. The south winds (including 
southwest, south and southeast) outnumbered the {north winds (including north- 
west, north and northeast), in the ratio of 595 to 404. 
The number of miles traveled by the wind during the year was 146,039, 
which is 9,154 miles above the annual average for the 7 preceding years. This 
gives a mean daily velocity of 389.01 miles, and a mean hourly velocity of 16.62 
miles. The highest velocity was at the rate of 80 miles an hour, from 3:30 
to 3:45 A. M., on April 25th. The highest daily velocity was 1,121 miles, on 
March 27th and April 18th; the highest monthly velocity was 16,709 miles, in 
April. The three windiest months were March, April and May; the three calmest 
months were July, August and September. ‘The average hourly velocity at 7 
A. M. was 15.30 miles; at 2 P. M., 18.44 miles; at 9 P. M., 15.70 miles. 
Mean height of barometer column, 29.123 inches; at 7 A. M., 29.148 in.; 
at 2 P. M., 29.099 in.; at 9 P. M., 29.123 in.; maximum, 29.791 in., on Novem- 
ber 21st; minimum, 28.303 in., on April 18th; yearly range, 1.488 inches. The 
highest monthly mean was 29.295 in., in November; the lowest was 29.019 in., 
in May. The barometer observations are corrected for temperature and instru- 
mental error. 
The average atmospheric humidity for the year was 67.9; at.7’A. M., 79.23 
at 2P.M., 49.9; atg P. M., 74.6. The dampest month was December—mean 
humidity, 76.5; the dryest month was April—mean humidity, 53.4. There were 
18 fogs, of which 9 were in January and 4 in December. The lowest humidity 
for any single observation was 11.8, at 2 P. M. on April r4th—less than one- 
eighth of saturation. 
The following tables give the mean temperature, the extremes of tempera- 
ture, the velocity of the wind, the per cent. of cloudiness, the relative humidity, 
the rainfall (including melted snow), and the depth of snow for each month of 
the year 1880, and a comparison with the 12 preceding years: 
880) menstura|templuc|temsewer ewe | coi, |aaaug | mean 
January....| 41.23 67.0 ZONE T25500 (9) 4554.0 WB e) Ml Biexsys) || (0.0) 
February.. | 37.58 69.0 SiO MEL, SOL) | 24.04 OA SSO 3) O10 
March H AGREE 42.38 79.0 Zak 13,841 44.94 O23 AE 2E Oss 20 
JEN OVI ls, Seonne 56.92 93-0 BNO || LOW yuo Roa) | Mes [eee 
IMI WVe6 Baageo | 70.59 94.0 52-0 els. Los) 40.43 OH zilgatst | (o( 
Jitlingepeeasan Rea sul 96.0 Ouse 2,029.1, A700 OSH TAs Oh Oso 
Saunlyabeanen. Seis 98.0 54.0 Oyu ee Ae. Be GSesi | 252 Aa MOnO 
August..... aS adls ) TKO) 50.5 8,863 | 45.70 OE Ont: O32) Ose 
September.| 64.59 85.0 AZ ROMEO). 241) 1424 00 Bele 284 0 ero 
Octover ens Ns2e 52 81.0 BO) |) Tease FAs | XQ). CONS 227, 3h lose 
November.| 31.58 65.5 oS, |) IL eI Ns 18/9) ALAS?) 202) Ass 251 
December. | 25.84 61.0 | —12.0 11,661 54.08 HOSO On 4 Qui mtas 
Means......| 54.01 82.5 ZT OM ieli2), TOO | 40.15 (OO) ZT enone 
