324 METEOEOLOGY. 



GOVEEKMENT OBSEEYATOEY, SYDNEY. 



Latitcdi 33" 51' 41" ; LoxGiirDE 10^ -i™ 46' ', Magnetic Variation 9° 32' 45" East. 



AUG-UST, 1876.— aENEEAL Absteact. 



Barometer ... Highest Eeadiug ... ... 30-333 inclies on tlie 1st, at 11 a.m. 



At32°Falit. LoAvest Eeacling 29-419 „ on tlie 24tli, at 9 p.m. 



Mean Height 29-956 



(Being OOIS inch greater than that in the same month on an average of the preceding 17 years.) 



Wind ... Gi-reatest Pressure ... 12-5 lbs. on the 7tli and 17tli. 



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



]S'mnber of Days Cahn ... 



Prevailing Direction . . . W.X.W. 



(Prevailing direction during the same month for the preceding 17 years W.) 



Teinperature Highest in the Shade ... 72-1 On the 31st. 



Lowest in the Shade . . . 40-8 On the 19th. 



Greatest Eange 23-5 On the 31st. 



Highest in the Sun ' ... 109 On the 30th and 31st. 



Highest in Black Box with 1 ico.- n <-i, ot <- 

 pii rr t 162o On the 31st. 



Glass Top ... ) 



Lowest on the Grass . . . 34-8 On the 19th. 



Mean Diiu'nal Eange ... 14*6 



Mean in the Shade ... 54-8 



(Being 0"3 greater than that of the same month on an average of the preceding 17 years.) 



Humidity... Greatest Amount 100-0 On the 4th, 15th, and 23rd. 



Least 48-0 On the 31st. 



Mean 76-5 



(Being 6 5 greater than that of the same month on an average of the preceding 17 yefirs.) 



Rain... ... Kumber of Days . . , ... 14 rain and 5 dew. 



Greatest Fall 0*552 mch, on the 23rd. 



Total Fill -f ^"^^^ inch. 65 ft. above ground. 



■■■ \l'295 inch. 15 in. above gi'oimd. 



(Being 1546 inch greater than that of tlie same month on an average]of the preceding 17 years.) 



Evaporation." Total Amount 3-096 inches. 



Ozone ... Mean Amount 7-7 



(Being 2 8 greater than that in the same month on an average of the preceding 15 years.) 



Electricity... Number of Days Lightnmg 8 



Cloudy Sliy... Mean Amount 45 



Number of Clear Days ... 3 

 Meteors ■•• Number Observed ... 3 



Be-marJcs. 



The weather has been dry and hot, with prevalent westerly winds during the 

 month. _ At Sydney the rainfall is less than half the average for the month, and at 

 aU stations except Orange the rainfall has been small. Lightning has been frequent 

 at Sydney, and the Zodiacal light has been very bright, on the 12th extending to an 

 •altitude of 45° 



