O METEOROLOGY. 



GOVERNMENT OBSERVATORY, SYDNEY. 



Latitude 33° 51' 41" ; Longitude 10>> 4 m 46» ; Magnetic Variation 9° 32' 45" East. 



AUGUST, 1875.— General Abstract. 



Barometer Highest Reading 30-248 inches on the 27th, at 8 a.m. 



At'32°Eaht lowest Reading 29308 „ on the 31st, at 3 p.m. 



Mean Height 29'834 



(Being 0115 inch less than that in the same month on an average of the preceding 16 years.) 



Wind ... Greatest Pressure 231 lbs. on the 20th. 



Mean Pressure ... ... 07 lb. 



Number of Days Calm ... 



Prevailing Direction ... W. 

 (Prevailing direction during the same month for the preceding 16 years W.) 



Temperature Highest in the Shade ... 81"8 On the 20th. 



Lowest in the Shade ... 41'0 On the 14th. 



Greatest Range 265 On the 18th. 



Highest in the Sun ... 115-1 On the 20th. 



Highest in Black Box with ( ±m Qn ft , 



Glass Top ( 



Lowest on the Grass ... 307 On the 11th. 

 Mean Diurnal Range ... 17'3 

 Mean in the Shade ... 57 3 

 (Beiug 30 greater than that of the same month on an average of the preceding 1(5 years.) 



Humidity ... Greatest Amount 96 On the 19th. 



Least 320 On the 18th. 



Mean 68*8 



(Being 3-0 less than that of the same month on an average of the preceding 16 years.) 



Rain ... Number of Days ... ... 4 rain and 5 dew. 



Greatest Fall 0-211 inch. On the 9th. 



m j. -I to. -ii ( - 337 inch. 65 feet above ground. 



'" \ - 520inch. 15 inches above ground. 

 (Being 2-466 inches less than that of the same month on an average of the preceding 16 years.) 



Evaporation Total Amount 3'839 inches. 



Ozone ... Mean Amount 5-6 



(Being 0-7 greater than that in the same month on an average of the preceding 14 years.) 



Electricity Number of Days Lightning 8 



Cloudy Sky Mean Amount 49 



Number of Clear Days ... 3 



Meteors ••• Number Observed ... 5 



Remarks. 



The rainfall during this month has been very small (although more than the 

 August totals of 1859 and 1871), being 2*468 inches below the average of the pre- 

 ceding 16 years. Snow and heavy frosts prevalent in the country districts. Thunder 

 and hail storms at Sydney and some of the country stations, and hot winds at Sydney 

 16th, 18th, and 20th ; at Port Macquarie on 20th ; Scone, 15th and 29th ; Mount 

 Victoria, 19th ; and at Moruya and Bodalla on the 30th. 



