BY WM. FRYAK, IXSPECTOR OF MIXES, QUEENSLAND. 21 



At the last named mine the tempt, at the surface was 70 

 clegs, at 8 a.m. At the 240 feet level where the mine is holed 

 into another mine, temperature 70 degs. at the 420 feet level, 

 two men working 580 feet in the level, temperature at shaft 74 

 degs. The therm, at the face showing a temperature of 79 

 degs., but there is no division or artificial means of ventilation 

 in this level. 



At 830 feet, thermometer 78 degs. at the shaft, there were 

 four men at work 150 feet in from the shaft ; and at 930 feet, 79 

 degs. The trucking is done here from the men working between 

 this and the 830 feet level, but no other work is being done. On 

 returning to the surface at 10 a.m., temperature 76 degs. 



This being near the Spring equinox, and therefore free from 

 the influence of either extreme of summer or winter, the 

 temperature at a few other places was taken. That at the top 

 of the Ellen Harkins' shaft was 78 degs. m the shade ; at the 

 720 feet level, 72 degs. ; at the (300 feet, 72 degs.; and at 400 feet, 

 72 degs. In this case there is a separate communication to the 

 surface, and winzes holed from one level to another in each case, 

 so that the heated air can ascend to the surface without vitiating 

 the air at the shaft. On return to the surface at noon the tem- 

 perature was 81 degs. 



At the surface of the Crown and Phoenix mine, 1st October, 

 10 a.m., the temperature was 74 degs. in the shade. At the 

 640 feet level, 71 degs. ; no work was being done here, except 

 by one man trucking from the shoots ; and the level is holed 

 into other mines. The shaft is centered to the bottom. At the 

 733 feet there is no holing into any other mine or level, two men 

 are working in a crosscut 190 feet in, temperature at shaft, 72 

 degs. ; and at the 430 feet level, where holed into other mines, 

 68 degs. at the shaft. 



At No. 4 North Phcenix, 2h. p.m., thermometer at surface, 

 78 degs. At the 347 feet level, 76 degs. There are five men in 

 this level and it appears to act as a return for the whole mine, 

 the stopes being open up to that point. The mine is also open 

 to the adjoining mines, and probably answers as a return air- 

 way for two or three mines. At 440 feet level, thermometer 

 72 degs., several men are working betwixt this and the next 



