20 REMARKS ON TEMPERATURE OF THE EARTH IN MINES 



70 clegs. A slight ventilation had been kept up during the 

 dinner-hour, from 12 to 1, and no men had been working, hence 

 the equality of temperature in the whole length of the shaft. 

 Two men had been working in a cross-cut 400 feet in from the 

 shaft in which the temperature was now 84 degs., whicli would 

 soon affect the temperature of the shaft on the men resuming 

 work. The temperature of the surface was 66 degs. on our 

 return at 2h. 30 m. p.m. 



At 3h. p.m. at the Golden Crown shaft, therm. 68 degs.; 

 at 240 feet, 68 degs. ; at 420 feet, 74 degs. ; at 830 feet, 76 

 degs. ; at 930 feet, 73 degs ; and at 1200 feet, 75 degs. The 

 temperature was somewhat higher at the surface here than 

 anticipated — probably tempered somewhat by a large quantity 

 of steam being blown off from the crushmg plant and winding 

 engine boilers. At the 930 feet level, charges had been recently 

 fired, and the smoke ascended by a Avinze to the 830 feet level, 

 so causing the abnormal heat at that point in the shaft. The 

 <;entering is carried to the bottom, but there are no winzes or 

 other holings below that between 830 and 930 feet. The 240 

 feet level is holed into another shaft, and the temperature was 

 there down to that at the surface, 68 degs. ; on ascending to the 

 surface at oh. p.m., the thermometer stood at 66 degs. This is 

 the winter series of observations, and the weather was excessively 

 cold and clear. The observations Avere all taken on one day, 

 and consequently at all the usual working hours ; but this is 

 probably not of so much consequence in the winter as it might 

 be during the summer months. 



The Great Alonkland had ceased Avorking and I was there- 

 fore unable to get any observations in that, the deepest mine on 

 the field or in the colony, Avhich has been stopped for the present 

 at a depth of 1500 feet. 



The above-mentioned mines Avere again A-isited on 30 th 

 September, but, it is to be regretted, access to the deeper leA'els 

 ■could not be obtained. The Great Monkland had not resumed 

 work, the InglcAvood had ceased Avork, the Sinithfield United 

 had unfortunately been flooded, and the deep workings at the 

 ■Golden Crown Avere suspended touching some rearrangement of 

 Avork. 



