The different temperatures of Rose Hill and Sydney in winter, though only twelve miles apart, afford, however, curious matter of speculation.
Of a well attested instance of ice being seen at the latter place, I never heard.

At the former place its production is common, and once a few flakes of snow fell.

The difference can be accounted for only by supposing that the woods stop the warm vapours of the sea from reaching Rose Hill, which is at the distance of sixteen miles inland; whereas Sydney is but four.* Again, the heats of summer are more violent at the former place than at the latter, and the variations incomparably quicker.

The thermometer has been known to alter at Rose Hill, in the course of nine hours, more than 50 degrees; standing a little before sunrise at 50 degrees, and between one and two at more than 100 degrees.

To convey an idea of the climate in summer, I shall transcribe from my meteorological journal, accounts of two particular days which were the hottest we ever suffered under at Sydney.
[*Look at the journal which describes the expedition in search of the river, said to exist to the southward of Rose Hill.