ABSTRACT OF PROCEEDINGS. 



xh 



as from a furnace. In a few minutes the temperature rose from 

 75° to 86°, and during the blast reached 95*5°, or three and a half 

 degrees higher than it had been at the hottest part of the day. 

 The phenomenon is the more remarkable when it is remembered 

 that it occurred after dark. This hot wind came from W.N.W., 

 and reached a force from fresh to strong. In the attached table 

 will be seen the shade temperature readings at 8 a.m., dry and 

 wet bulbs at 9 a.m., the daily shade maximum, and also the 

 maximum reading in the sun's rays : — 



Date. 



Shade Temperature in Louvred Screen. 



Maximum reading 

 in Sun's rays. 



8 a.m. 



9 a.m., Dry. 



9 a.m., Wet. 



9 a.m., Max. 



27 



28 

 29 



O o 



00 00 X 



83° 



o 



86 8 

 87 ? 4 



69°4 



o 



7a-l 



76-4 



92° 

 91 ? 8 

 95° 5 



159°8 

 15 3° 

 1,50° 



The thermometers have all been tested at Kew. I may add that 

 this observing station is situated on the Macleay River, approxi- 

 mately in Lat. 31° 2' S., Long. 151° 3' E., and is about seven 

 miles in a direct line from the coast. 



6. " Records of Rock Temperatures at Sydney Harbour Colliery 

 Birthday Shaft, Balmain, Sydney," by J. L. C. Rae, E. F. 

 Pittman, Assoc. e.s.m., and Professor T. W. E. David, b.a.,f.g.s. 



The deep sinking now being carried on at the Sydney Harbour 

 Colliery, Balmain, with which one of the authors is actively 

 associated, affords a very favourable opportunity of noting the 

 nature and temperatures of the various rocks underlying the 

 neighbourhood of Sydney, and this the authors are utilizing. The 

 paper read deals with the temperatures noted to a depth of 1,450 

 feet, which was the depth reached in the shaft at the middle of 

 November. The thermometers used were specially supplied by 

 Professor Everett, f.r.s., Secretary of the British Association 

 Committee on the subject of underground temperatures. The 

 sinking of the Birthday Shaft had reached a depth of 600 feet 

 before the thermometers were available, but since then, observa- 

 tions have been made at intervals of practically, 50 feet, and an 



