300 METEOROLOGICAL OBSERVATIONS. 
GOVERNMENT OBSERVATORY, SYDNEY. 
LATITUDE 33° 51’ 41” ; LonairupE 104 4™ 46"; MAGNETIC VARIATION 9° 25’ 2” East. 
APRIL, 1878.—GernERAL ABSTRACT. 
Barometer ... Highest ryote ... 80°267 incheson the 9th at 10°50a.m. 
At 32° Faht. Lowest Readin ... 29°392 inches on the 28th at 3 a.m, 
Mean dha eer et ... 29°92] inches. 
(Being inch less than that in th th ge of the preceding 19 years.) 
Wind... ... Greatest Pressure.. ... 82°0lbs. on the 29th 
Mean Pressure son Oa Ih, 
aheoeteed of Days Calm... 1 
Syereihing Dir rec oe age) 
Ie th for the preceding 19 years, W.) 
a pigbent i a ey Shade ... 79-0 on the 19th. 
Low he Shade Soh ee on bi 25th. 
Groatest 5s nee tks 20°1 e 16th. 
' Highest in the Sun . 139 ie on a 19th. 
Highest in Black Box with 
ass Top . 1782 on the Ist. 
Lowest on the Grass ... 45°3 on the 25th. 
Mean Diurnal eee S| 
Mean in the Shade ia. Deck 
(Being 1°1 inch greater than that of the same month on an average of the preceding 19 years.) 
Humidity .. Greatest Amount... . 100-0 on the 10th. 
Least ine i: bs on the 15th. 
Me 
(Being 1°6 less than that of tl the same S aome ¢ on an average of the preceding 19 years.) 
Rain ... Se en of Days ... oh — dew. 
Greatest Fall ie ..  0°896 inch on me ell - 4 
22 inch. 65 feet a _ groun 
‘Toa — 11760 inch, 15 ina und. 
(Being 5°433 inches less than that of the same month on an average of the ae 19 years.) 
Evaporation Total Amount... ... 3°570 inches. 
Ozone . ... Mean Amount 65 
(Being 1°3 g ee iene +} ¢ f the preceding 18 years.) 
icity ... Number of ey Lightning 4 
Cloudy Sky... Mean Amoun’ wi ae 
Number of Clear Days ie 
Meteors =... Number Observed... Nie | 
Remarks, 
The barometer this month has been slightly below the average of past 19 years, a 
and the temperature 1*1 above the average. Rain i in the Colon generally has beep 
a ng has fallen. 
on level, a 
gation on the Darling is almost closed ; during the late flood some of the steamers — 
got up the river as far as Wilcannia, . ee 
