Months.

II. METEOROLOGICAL TABLES FOR CAMBRIDGE, MASS.

Summary of the Meteorological Observations made at the Observatory of Harvard University, from May 1st, 1848, to May 1st, 1849. By Wm. Cranch Bond. Lat. 42° 23′ N., Long. 71° 08′ W. of Greenwich.

Lowest temperature, February 20th, 1849, -70; highest, July 21st, 1848, 900. Range, 970,

Maximum of barometer during the year, February 28th, 1848, .

III.

METEOROLOGICAL TABLES FOR CAMBRIDGE, MASS.

Summary of the Meteorological Observations made at the Observatory of Harvard University, from May 1st, 1849, to May 1st, 1850. By Wm. Cranch Bond. Lat. 42° 23′ N., Long. 71° 08′ W. of Greenwich.

30.059 30.063 30.039 .024 30.035 30.049 22.9 26.0 32.2 27.6 27.1 29.878 29.976 29.841 .135 29.922 29.904 25.2 29.0 35.0 28.2 29.3 29.821 29.800 29.769 .031 29.839 29.807 31.0 31.5 32.3 30.7 31.1 29.877 29.891 29.832 .059 29.876 29.869 38.0 44.4 47.6 39.3 42.3

Annual Mean, 29.99330.006 29.960 045 29.993 29.988 42.6 49.2 53.7 45.8 47.8

The condition of the instruments remains the same as in former years.

The greatest range of the barometer in 24 hours was on December 22d, 1.044 inch.
The barometer was highest, February 6th, 9 A. M., 30.822 inches; attached therm., 56°.

66

66

lowest, March 7th, sunrise,

Extreme range during the year,

66 50.

The mean height of barometric column during the year was 29.988 inches. The mean temperature, at the hours mentioned above, for the year, 470.83; for the spring, 410.98; for the summer, 690.49; for the autumn, 510.41; for the winter, 280.47. External thermometer highest, June 22d, 3 P. M., 970; lowest, Feb. 6th, sunrise, -30. Range, 1000,

IV. METEOROLOGICAL TABLE FOR LOWELL, MASS. Abstract of the Record of the Heights of the Thermometer, at the Lower Locks, Lowell, in 1849. By James R. Moor.

The temperature of the water in the canal, which in the summer months receives the whole waters of the Merrimac River, was above 320 from March 22d to December 8th, inclusive.

V.

METEOROLOGICAL TABLE FOR WORCESTER, MASS. Lat. 42° 16' 17" N.; elevation 483 feet. For the Year 1848-49.

1848-49.

Barometer.

Least height,

inch. inch. inch. inch. inch. inch. inch. inch. inch. inch. inch. inch.

29.41 29.47 29.49 29.45

Greatest height, 29.80 30.09 30.14 29.90 29.83 29.82 29.79 29.72 29.61 29.80 29.74 29.70 23.98 23.85 28.85 23.99 28.24 23.90 23.19 29.15 29.13 23.43 23.78 23.93 29.03 29.36 28.99 29.43 29.37 29.11 29.26 29.34

Mean, Thermometer.

Greatest height, 61

1 -10 -9 13 18 36 46

Least height,

Mean,

31

23 24 36 42

62

19

Cloudy days,

Rain fell, days

1 10 6 10

Snow fell, days

05120505

020104O7

09961300

18

11202224

5

1.25 1.60 4.23 2.49 6.45 4.11 36.65 0 0 0 0

0

0703040*

13

14143212

48

4

147

7

6

44

VI.

METEOROLOGICAL TABLES FOR PROVIDENCE, R. I.

Summary of Meteorological Observations made at Brown University. Lat. 41° 49' 22" N., Long. 71° 24' 48" W. from Greenwich. Barometer reduced to the Sea-level, and to 32° Fahr., and corrected for Capillary Action. By Prof. A. Caswell.

REMARKS. The barometer used was made by J. H. Temple, Boston. It is an open cistern barometer, with a screw for bringing the surface of the mercury in the cistern to a contact with an ivory point, and a microscope for the adjustment of the upper and lower surfaces, and for the reading off." The interior diameter of the tube is about three tenths of an inch, and the readings are to hundredths of an inch, and are uniformly taken at the top of the convexity of the mercury.

The greatest height of the barometer, corrections as above, was 30.73 inches, on the evening of the 27th and morning of the 28th of February. The least was 29.01 inches, on the 22d of December. Extreme range for the year, 1.72 inches.

On three days the thermometer in the shade stood at 970 at 1 P. M., viz. June 21st and

VII. METEOROLOGICAL TABLES FOR MENDON, Mass. Lat. of Spire of Unitarian Church, 42° 06′ 23′′ N., Long. 71° 33′ 35′′ W. from Greenwich. By John Geo. Metcalf, M. D., Member of the American Statistical Association. For the Year 1849.

22d, and July 13th; the latter was the hottest day, the mean of three observations being 860.3; wind fresh at N. W. The thermometer twice only fell below zero, viz. on the mornings of January 11th and February 16th. The former was by much the coldest day in the year; the thermometer at sunrise standing at 40 below zero, and the mean of three observations being 30.6; wind brisk at N. W.

Of the 107 days on which rain or snow fell, there were only 52 on which the quantity was 0.10 of an inch or more. On eleven days the quantity was 1.00 inch or more. The heaviest rain of the year was on the night of March 21st, with heavy S. W. wind, and barometer low; quantity 3.12 inches.

The year taken as a whole was unusually dry, the quantity of rain being 3.7 inches below the average for this place. The position of the rain-guages is about 150 feet above tide-water in the Providence River.

.9 1.9

2.2

.9 1.4

4 1

.8 1.6

1.8

.6 1.2 2

1.2 1.9

2.0

.7 1.4

9

1.3 2.0 2.0
.9 1.6
1.3 1.7

1.2 1.5

1.9

1.1

1.3 8

2.0

1.8

19 85321622
1243222324

N. E.

East.

138121S. E.

South.

S. W.

www.West.