6 METEOROLOGY. 



GOVERNMENT OBSERVATORY, SYDNEY. 



Latitude 35° 51' 41"; Longitude 10 h 4 m 46"; Magnetic Variation 9° 32' 45* East 



JUNE, 1875. — General Abstract. 



Barometer ... Highest Reading 30-077 inches on the 4th, at 10 p.m. 



At 32° Faht. Lowest Reading 29-540 „ on the 12th, at 3 p.m. 



Mean Height 29 825 



(Being 0'099 inch, less than that in the same month on an average of the preceding 16 years.) 



Wind ... Greatest Pressure 198 lbs. on the 26th. 



Mean Pressure ... ... 0-7 lb. 



Number of Days Calm ... 1 



Prevailing Direction . . . W.N.W. 

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



Temperature Highest in the Shade ... 701 On the 26th. 



Lowest in the Shade ... 42*5 On the 22nd. 



Greatest Range 19'4 On the 23rd. 



Highest in the Sun ...105-0 On the 2nd. 



H1 g G^s n T?p aCk . B ° X W '^ } 140 "° 0n the 2nd - 

 Lowest on the Grass ... 345 On the 22nd. 

 Mean Diurnal Range ... 123 

 Mean in the Shade ... 55'6 



(Being 09 greater than that of the same month on an average of the preceding 16 years) 



Humidity ... Greatest Amount 1000 On the 3rd, 4th, and 27th. 



Least 48-0 On the 14th. 



Mean 786 



(Being T6 greater than that of the same month on an average of the preceding 16 years.) 



Raill ... ... Number of Days ... ... 10 rain and 5 dew. 



Greatest Eall 2'395 inches. On the 6th. 



m f i t* ii ( 5579 inches. 65 feet above ground. 



lotai^all ... ••• \ 7-818 inches. 15 inches above ground 



(Being 2*063 inches greater than that of the same month on an average of the preceding 16 years.) 



Evaporation Total Amount 1*219 inch. 



Ozone . . . Mean Amount ... ... 4*9 



(Being 0*5 less than that in the same month on an average of the preceding 16 years.) 



Electricity... Number of Days Lightning 2 



Cloudy Sky Mean Amount 66 



Number of Clear Days ... 3 



Meteors ... Number Observed ... 



Remarks. 



The heavy rains of May continued until about the 7th of the month, then a 

 space of fine enjoyable weather until the 26th, when one of the heaviest seas known 

 on the S.E. Coast for years set in and lasted until the 2nd July ; the full force being 

 felt in the neighbourhood of Ulladulla (South of Sydney.) The Wollongong break- 

 water was seriously damaged by the washing away of four blocks of concrete, each 

 twenty -five tons weight. 



