ANNUAL METEOROLOGICAL SUMMARY FOR THE YEARS 1899 AND 1900-Continued.

SOME MAXIMUM AND MINIMUM TEMPERATURES.

The following tables showing the temperature when the thermometer registered 80° or above and 32° or below (Fahrenheit), with dates of same, were kindly furnished by Mr. Thomas Tennent. The thermometers used by Mr. Tennent were self-registering instruments purchased from McAllister & Co., of Philadelphia, Pa., and brought out by him in 1849; they were tested and found to be correct. The thermometers were exposed on the north side of a building, on supports about 10 inches from the walls and about 6 feet above the ground. The readings were made by Mr. Tennent personally, and cover the period from September 1, 1849, to December 31, 1871:

NOTES FROM THE RECORD OF G. H. GIBBONS, M. D

1847.

[From the California Star, San Francisco.]

January 19.-Ice nearly one-fourth inch thick-the first of the season; said to be a cold winter.

February 13.-Heavy rains still continue at regular intervals of four to eight days. Already more rain this season than in last three years.

April 3.-A number of heavy rains in last six days. Dry weather for four or five weeks preceding. Dry weather appears to have followed.

May 8.-During the past week a succession of showers, sufficient to moisten the earth-the annual "May rains;" none to come after. San Joaquin country flooded; unusual amount of rain on the mountains in winter.

May 22.-Several light showers during past week.

July 2.-A light but refreshing shower, barely sufficient to render the dust adhesive; a promise of more.
August 21.-Cold winds and heavy fogs throughout the week.

August 28.-A heavy shower of rain in evening, with thunder and lightning, extending some miles back.
September 18.-A week of hot and calm weather; 92° in shade.

September 25.-Sou'westers, sea fogs, etc.; "cool to overcoating" this week.

October 20.-A furious norther, lasting till evening.

October 30.-Weather dubious, inclining to "heavy wet."

November 6.-Winter fairly closed in. The past week cold and disagreeable, with drenching rains and cold winds. For a few days no locomotion allowed.

1848.

February 26.-Rain fell abundantly the past week, and snow on the mountains.

March 18.-Heavy rains during the week. Several weeks preceding the weather was delightful; 63°.
April 1.-Rains have been abundant.

1849.

[San Francisco Whig of September 3, 1852.]

September 19.-Thunderstorm on Mokelumne River.

[From the Alta-California, April 17, 1850.]

The first southeast blow was on November 13 and the last in March; 7 southeast blows in that period, and seventy-one days rain in those one hundred and thirty-nine days. Mean barometer 29.12; temperature 57°.

1850.

[From the San Francisco Herald.]

September 10.-Heavy rain above Marysville.

September 11.-Shower at Marysville.

September 12.-First rain of season; light shower at 6 a. m. at San Francisco.

September 15.-Gentle rain most of day at San Francisco.

September 20.-Shower last night.

September 20 and 22.-Rain on Tuolumne; great flood.

September 21.-Moist and hazy. Much rain during day.

September 22.-Bright and warm.

September 23.-Rain at 2 p. m. and all the evening.

October.-No rain noted during month.

November 19.-Rain at times; began in morning; slight showers frequent through the day and night. Severe gale from southeast in p. m.; blew down Presbyterian church on Stockton street and damaged shipping.

November 22.-Rain storm. Price of carting raised from $1 and $1.50 to $2 and $2.50 from mud.
November 23.-Calaboose inundated 1 foot during night.

The tables of monthly and seasonal rainfalls for San Francisco are given on page 9. TOTAL NUMBER OF DAYS ON WHICH PRECIPITATION HAS FALLEN FROM MARCH 1, 1871, TO MARCH 1, 1901.

HIGHEST WIND VELOCITY, DIRECTION, AND DATE FOR EACH MONTH TO DECEMBER 31, 1900.

GREATEST PRECIPITATION (INCHES AND HUNDREDTHS) IN TWENTY-FOUR HOURS FOR EACH MONTH.

Greatest

2.03 3.98

3.14

date. 29, 1881 4-5, 1887 4-5, 1879 23-24, 1896 4-5, 1889 11-12, 1884 16, 1886 29-30, 1896 29-30, 1894 17-18, 1889 23, 1874 18-19, 1871

DATES WHEN PRECIPITATION EQUALED OR EXCEEDED 2.50 INCHES IN ANY CONSECUTIVE TWENTY-FOUR HOURS.

December 17 and 18, 1871, from 11.43 p. m. 17th to 11.43 p. m. 18th.
December 18 and 19, 1871, from 11.43 p. m. 18th to 11.43 p. m. 19th
November 22 and 23, 1874, from 11.08 p. m. 22d to 11.08 p. m. 23d..
March 4 and 5, 1879, from 4.43 p. m. 4th to 4.43 p. m. 5th..
January 28 and 29, 1881, from 11.08 p. m. 28th to 11.08 p. m. 29th..
November 23 and 24, 1885, from 11 p. m. 23d to 11 p. m. 24th.
December 21, 1885, from 1.35 a. m. 21st to 1.35 p. m. 21st.
February 4 and 5, 1887, from 3 p. m. 4th to 3 p. m. 5th..

March 12 and 13, 1889, from 8.15 a. m. 12th to 8 a. m. 13th...

February 14 and 15, 1891, from 8.45 p. m. 14th to 8 p. m. 15th...
January 19 and 20, 1894, from 8 p. m. 19th to 8 p. m. 20th
November 23 and 24, 1896, 6 a. m. 23d to 6 a. m. 24th...

Inches.

2.83

3. 12

3.98

3.31

4.67

2.58

2.78

3.60

3.08

3.38

2.61

2.79

January

Maximum rates of rainfall January 1, 1893, to December 31, 1900: Five minutes, 0.16; 10 minutes, 0.19; 1 hour, 0.55. On February 22, 1901: Five minutes, 0.17; 10 minutes, 0.21. On October 23, 1902: Five minutes, 0.16; 10 minutes, 0.20. On February 7, 1903: Five minutes, 0.19; 10 minutes, 0.23.

GREATEST MONTHLY PRECIPITATION AND DATE.

February

March..

April

May

June..