152 



ALEX. L. DU TOIT. 



The temperature found (180° F.) given for Nonda Downs 

 No. I, beside the Northern Railway in Queensland, with a 

 reputed large flow would, if correct, indicate a rate of 1° P. 

 in 12 feet, in marked contrast to its neighbour (112° F., 

 1° F. in 34) at the railway station of that name. David 1 

 has also cited cases of rapid increases in this quarter, e.g., 

 at Toorak and Strathfield. 



The variation in mean annual surface temperature is 

 fully 14° F. across the basin from north to south, but the 

 correction for altitude is fortunately small. 



Diagram II. — Areal Distribution of Temperature Gradients ; figures 

 represent values in feet per degree F. (20-|- indicates 1° F. for 20 - 29 feet ; 

 30+, 1° F. for 30-39 feet, etc.). 



Proc. Roy. Soc. N.S. Wales, Vol. xxvn, p. 423, 1893. 



