METEOROLOGV. 507

MEAN AND EXTREME TEMPERATURES, WIITH THE AMOUNT OF RAIN FALLEN AT DIFFERENT POINTS, DURING THE YEAR 1857.

AIKIN, S0UTH CAROLINA.

Tatitude, 330 32 N.; longitude, 810 34/ W. Flevation above tide-water, 565 feet. Hours of observation, 7 A. M. and 2 and 9 P. M. Latest frost in spring, April 7; earliest frost in autumn, November 19; period without frost, 225 days. Observer, Jonx H. CoRNISH.

Dan. Feb. Mar. Apr. May. June. July. Aug. Sept. Oct.(Nov. Dec. Annual.

Weneneden 33. 73 58.86 51.58 55.69 68.85 77.50 76.40 79.56 75.13 61.87 32,86 51,23 02. 11 66 92 d, 92 90 178 4 Therm'r extremes. 8 21 33 66 64 69 55 4 19 31[....

50 Rain, inches.... 0. 70 3.18 2.23 4.11 2.22 5,15 6.95 0.17 0.81 1.97 4234 38. 15

ALEXANDRIA, VIRGINIA.

Latitude, 38⁰ 48/ N.; longitude, 770 01/ W. Elevation above tide-water, 56 feet. Hours of observation, 7 A. M. and 2 and 9 p. M. Latest frost in spring, April 6; earliest frost in autumn, October 22; period without frost, 198 days. Observer, BENJAMIN HALLOWELL.

Apr. May. June July. Aug. gept. Oct. Nov. Dec. Annual.

Thermometer, mean. 23.59 42.23] 40. 4 ½ 47 51 63.38 74.04 76.31] 75.65 6 89 3

Jan. Feb. Mar.

4 7.34 55.75 45.50] 42 93 54. 59 40 75 84 90 A A a eere e. Tnerm'r extremes.) 6 11 2. 42 85 358 70, 34, e...... Rain, inches....... 3.05 0.49 2.42 4.45 4.86 4.54 5.30 2.30 1.93 5.44 37.66

. AMHERST, MASSACHUSETTS.

Latitude, 420 22˙ N.; longitude, 720 34/ W. Elevation above tide- kater, 267 feet. Hours of observation, 7 A. M. and 2 and 9 P. M. Latest frost in spring, April 8; earliest frost in autumn, September 7; period without frost, 151 days. Observer, Professor E. S8. SNELL.

Feb. Mar. Apr. May.

Jan. June.] July. Aug. Sept. Oet. Nov. Dec. Annual.

63.30 70. 63 67.23] 59.83] 48.63 38.90] 31.62 46. 18

Thnermometer, mean. 3. 50 31.46 31.34 41.04 56.75

69 54.5 55 85) 81 90 99 86 76 67 52[„.... Therm'r extremes.. 1—- 3 4 114 40 49 53 V 54 32 2 3 2..... Rain, inches..... 3.54 2.40 2.12 7.68 6.81 2.66 4.98 3.14 3.03 3.87 2.06 5.31 47.56

ANNAPOLIS, MARYLANDP.

Latitude, 380 58 N.; longitude 760 29" W. Elevation above tide-water, 20 feet. Hours of observation, 7. 4. M. and 2 and 9 P. M. Latest frost in spring, April 7; earliest frost in autumn, October 21; period without frost, 196 days. Observer, WIIIIAM B. GOODMAN.

Jan. Te. Mar. V Apr. May. June. July. Au

V

44.81 823 07 71. 21 75.58] 74.92 68.76 55.88] 44.70 42.20 53. 44 68 94 90 95 89 71 71 60

25 83 56 43 31

3. 68 6.32 8. 589 6 19 5 96 1.53 3.43

1

g. Sept. Oet. Noy. Dec. Annual.

Thermometer, mean. 23. Therm'r extremes.

6 69 6

—

Rain, inches 2.97

6 50 15 V 20... 1.67 7 6.44 51.64

39.60 38. 31/4