METEOKOLOGY. U 



GOVERNMENT OBSERVATORY, SYDNEY. 



Latitude 33° 51' 41". Longitude 10 h 4 m 46?. Magnetic Variation 9° 32' 45* East. 



SEPTEMBER, 1875.— Genekal Abstbact. 



Barometer Highest Reading ... ... 30*289 inches on the 23rd, at 9 a.m. 



,, QO o-n i , Lowest Reading ... ... 29*420 „ on the 8th, at 6 & 7 a.m. 



At 32 .bant. MeanHeight 29-907 



(Being 0019 inch greater than that in the same month on an average of the preceding 16 years.) 



Wind • • • Greatest Pressure . . . 14*6 lbs. on the 21st. 



Mean Pressure ... ... 0*7 lb. 



Number of Days Calm ... 

 Prevailing Direction ... W.N.W. 

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



Temperature Highest in the Shade ... 88*5 On the 21st. 



Lowest in the Shade ... 411 On the 5th. 



Greatest Range ... ... 307 On the 8th. 



Highest in the Sun ...122-1 On the 21st. 



HiS GlaL in Top aCkB ° XWitl1 169 " 7 On the 20th. 

 Lowest on the Grass . . . 35'9 On the 4th. 

 Mean Diurnal Range ... 17*7 

 Mean in the Shade ... 57 '4 



(Being 12 less than that of the same month on an average of the preceding 16 years.) 



Humidity ••• Greatest Amount... ... 930 On the 14th and 22nd. 



Least 27-0 On the 21st. 



Mean 68*0 



(Being 08 less than that of the same month on an average of the preceding 16 years.) 



Rain... •■• Number of Days ... ... 11 rain and 2 dew. 



Greatest Fall 0724 inch. On the 14th. 



m i -pi] (1*058 inch. 65 ft. above ground. 



"* (1*700 inch. 15 in. above ground. 

 (Being 0-559 inches less than that of the same month on an average of the preceding 16 years.) 



Evaporation Total Amount ... ... 4*983 inches. 



Ozone ... Mean Amount ... ... 59 



(Being 0-8 greater than that in the same month on an average of the preceding 14 years.) 



Electricity. . . Number of Days Lightning 7 



Cloudy Sky Mean Amount 4*4 



Number of Clear Days ... 1 



Meteors ••• Number Observed ... 2 



Remarks. 



The rainfall during the month, although small, has only been 0559 inch below 

 the average of preceding 16 years : the temperature has also been below the average. 

 Frost showing itself at some of the country stations, and very heavily at Hunter's 

 Hill, a few miles from Sydney, on the 4th. Snow at Scone on 17th ; Mount Victoria 

 1st, 2nd, and 14th ; and Moss Yale, 1st and 14th. Hot winds at Lambton, 21st ; 

 Wentworth 5th and 8th, and Sydney 20th and 21st. Thunderstorms prevalent, and 

 a shock of earthquake felt at Moss Yale on the 25th at 9"30 p.m from west to east. 



