61. Cooling power of the mine measured by using . . . . . . . .
62. Fire damp composed of
63. Temperature stated in Farenheit or centrigrade, the conversion ratio is
64. The marsh gas called as
65. The gas law states that the volume of given mass of gas inversely proportional to pressure, the temperature remains constant.
66. Atmospheric air has the capacity to absorb moisture and air containing it called
67. A water gauge is placed in the fan drift, one end connected to the atmosphere and other in the fan drifts near the . . . . . . . . towards the mine.
68. The affinity for the haemoglobin of the blood is nearly . . . . . . . . times that of O2.
69. Oxygen of the air in a mine consumed for
70. The gas which is rotten egg smell.
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