Queensland.--There is no record of a fall of as much as 22 degrees in 15 minutes. But, on the other hand, a rise of 30 degrees in three hours is a common feature over the Darling Downs after sunrise. Owing to the diathermancy of the atmosphere already referred to, it is a fact, nevertheless, that in the "continental" or inland districts of Southern Queensland the temperature in winter is subject to sudden and marked changes. Barometric pressure, owing to the comparatively low latitude, is not exposed to sudden and marked changes, except during hurricane conditions, which usually affect the central coast-line in February and March. AS A COROLLARY TO THE PRECEDING, WOULD YOU SAY THAT THE CLIMATE IS MARKED BY GREAT VARIABILITY? New South Wales.--No; just the opposite. Indeed, as regards Sydney itself. there are few cities in which so much uniformity of temperature and slow changes, are to be found. The cause of any great change is the hot wind, and as that seldom comes more than three or four times in the year, great changes are infrequent. The mean diurnal range in Sydney is 11 1/2 degrees, and taking a series of years it is very unusual for the range on any day to reach 25 degrees. Victoria.--No; because these are exceptional phenomena. In the late Spring and during early summer the climate may be said to be occasionally subject to sharp and sudden changes, which give it the character of variability. But the deviations from mean temperature, except for short periods, are not remarkable. South Australia.--Yes, in summer; but not in winter. Queensland.--Certainly not; with the exception of the wide diurnal range of temperature in winter in the southern "continental" districts, as at Cambooya and Thargomindah. The changes are, according to my knowledge, far more sudden and marked in the southern colonies (as during a "shift" from N.E. by W., to S.W. for instance, at Melbourne, and especially at Adelaide) than in Queensland and its coastal districts. WITH REGARD TO SUSTAINED, PROLONGED, OR CONTINUED HIGH TEMPERATURES DURING THE SUMMER MONTHS, FOR HOW MANY DAYS HAVE YOU KNOWN THE TEMPERATURE REMAIN CONTINUOUSLY AT A HIGH LEVEL? THIS IS A VERY IMPORTANT QUESTION, AS IT CONCERNS INFANTILE MORTALITY IN NO SMALL DEGREE; I SHALL BE GRATEFUL FOR YOUR EXPERIENCE?