288 RESULTS OF THE METEOROLOGICAL OBSERVATIONS TAKEN DURING 



Temperature. 



The mean temperature for the two years under consideration at a height of 54 feet 

 above sea-level was 42°'5, being highest 48°"8 in February and lowest 35°'4 in July, 

 showing a difference of 13° "4 between the extremes. The highest temperature recorded 

 was 63° at 4 P.M. on February 1, 1903, and again at exactly the same day and hour in 

 1904, and the lowest 24°, which occurred on July 31, 1903, at midnight, and again on 

 July 27, 1904, at the same hour. The extreme range was thus 39°, but as the values 

 given are deduced from four-hourly eye readings, and not from registering instruments, 

 the absolute values were probably a degree or two above and below those given. The 

 greatest monthly rauge 27° occurred in February 1903, and again in December of the 

 same year, and the least range 13° in August 1904. The warmest mouth, February 

 1904, had a mean temperature of 49°"9, and the coldest 33'S in July of the same year, 

 showing a range of 16°'l in the mean monthly values. The seasonal values show a 

 range from 47°'8 in Summer to 37°'4 in Winter, a difference of 10°"4. At all seasons 

 the conserving influence of the surrounding ocean is clearly shown in the small tempera- 

 ture variations. 



Diurnal Range of Temperature. 



The diurnal range of temperature is approximately indicated in the following table, 

 which shows the mean values at four-hourly intervals for the two years. 



Hence at all seasons the maximum occurs at noon and the minimum at 4 a.m., but 

 in the absence of hourly values it is impossible to give the warmest and coldest hours 

 with exactitude. 



Amount of Cloud. 

 The mean amount of cloud (overcast sky or fog = lO'O) was 7'1, the cloudiest months 

 being June and December with a mean of 7 '6, while the minimum 6"6 occurs in 

 February, March, October, and November. The cloudiest months w'ere May, June, and 

 December 1904, with a mean of S'l, and the clearest November 1903, with a mean of 

 6 '2. The seasonal values show little variation, the cloudiest period of the year being 

 Winter, with a mean of 7-2., and the clearest Spring, with a mean of G'9. A notable 

 i'eature is the total absence of cloudless skies, there being only two days in the two 

 years on which the mean amount of cloud was less than 2-0. 



