C. -4

42

No. 2.—New Zealand Quartz-mines: Temperatures of Mine-air at Deepest Workings.

Mine-temperatures.

Place where Observations were taken. Temperature in Degrees Fahrenheit. Name of Mine. Date. Dry Wet Bulb. Bulb. Coromandel Goldfield — Old Hauraki .. 220 ft. level, main drive ,, face of stope, 300 ft. level, drive on reef .. O 74 74 76 74 69 83 77 76 77 77 76 O 71 71 74 72 67 83 76 75 76 76 75 14/9/10 Kapanga 11/8/11 ,, crosscut 400 ft. level, main crosscut 1,000 ft. level, drive west at 500 ft. . . ,, drive east at 60 ft. .. 920 ft. level, drive north 940 ft. level, drive west ,, rise 30 ft. up . . 900 ft. level, drive east at 100 ft. a Thames Goldfield* May Queen .. 12/8/11 Outside shade temperature 1,000 ft. level, face of south crosscut ,, Exchange reef ,, face of main crosscut at 730 ft. from shaft ,, end of 22 in. air-pipe 700 ft. from shaft 55 84-5 82 80 51 83-5 82 80 Saxon 76 73 New Sylvia .. Watchman 15/8/11 Outside shade temperature Adit (intake aircourse) ,, ,, leading stope Outside shade temperature Adit level, Dunedin lode, Outside shade temperature Beach adit level, end of air-pipe, 2,271 ft. in . . 55 65 71 62 64 62 70 51 64 71 56-5 63 58 69 Waitangi

I Date. Place where the Observations were taken. _. l_ _ Temperature in Degrees Fahrenheit. Dry Wet Bulb. Bulb. Waihi Mine. O O 19/8/11 8/8/11 .. . Outside mine, in shade .. .. "".. .. * Martha east drive from No. 2 shaft Welcome, west of Richard crosscut, 30 ft. in > Edward, east of Perch crosscut, about 200 ft. in Edward, 570 ft. in from Perch crosscut No. 4 shaft crosscut, 1,000 ft. in .. Reptile crosscut, 800 ft. in, end of blower-pipe 800 ft. in Empire, east face, 617 ft. in Royal face, 800 ft. in Face of crosscut Perry's stope, 24 ft. up, Empire Brown's stope Martha south, Robinson's stope Dutton's drive .. .. L9/8/11 .. Outside mine, in shade, Royal east face, 900 ft. in from No. 4 shaft Pearson's stope, 88 ft. up , : .. „ other end Napier's stope, 50 ft. up Royal Elsegood's stope, 40 ft. up . . .. Scorpion crosscut, face. 600 ft. in . . Edward and Welcome, 80 ft. up . . 21/8/11 .. Outside mine, in shade Edward level, under Bullock's pass Bullock's stope, 90 ft., west end .. ,, 90 ft., east end Empire, cast Williams's stope, 70 ft. up Furey's stope, 60 ft. up .. Regina section, Martha Prisk's place 62J 56- 2 75 74 74 73 .. 73| 73 83 82| 61 59 82 82 81£ 81| 78 78" 77 , 77 70 69 72 7<) 68£ 68 82 81 62J 54 77 ,76 79 .78 79 79 75 74 81 81 .. I 82 .80 .. i 75J 75 .. i 54 45 .. ! 80 79 .. | 82} 82 .. | 82 81£ .-. - 77 70 .. 78J 11\ .. I 70 m\ 21/8/11