INDEX. 



73 



Microcosmic salt, treatment of a 

 mineral before the blowpipe 

 with, 27, 28 



Mineral belt, ^ 



Minerals in igneous and meta- 



morphic rocks, 3, 17 

 nature of certain, 107, 108 



Mineral oil, 85 



Miocene rocks, 16 



Mispickel, 63 



Molybdenum, 33, 72 



Molybdenum sulphide, before 

 B. F., 28 



Montana, gold in, 60 



Moonstone, 97 



Mountain limestone, 17 



Mundic, 62, 63 



M APHTHA, 85 



Nellan, 89 



New Caledonia, nickel ore of, 73 

 New Guinea, gold in, 58 

 New Mexico, gold in, 60 

 New South Wales, gold in, 5 



tin ore in, 81 

 New Zealand, coal in, 85 



gold in, 58 

 Nevada, gold in, 59 



silver lodes in, 77 

 Nickel, arsenical, 73 



emerald, 73 



hydrated silicate of, 73 



white, 73 



tests for, 27, 28, 29, 72, 109 

 Njtrateofsoda, 87 

 Nullagine, gold and diamonds in, 

 58 



QBSIDIAN, 13 



Ochre, red, 63 

 Octahedron, 36 

 Olivine, 97, 103 

 Onyx, 97 

 Oolite, 1 6 



Opal, characteristics ofj 96 

 Ore beds, 20 

 Outcrops, 4, 20 



Leadville, Colorado, n 



carbonate of lead deposits 



(carrying silver) at, 69, 77 

 Lignite, 85 

 Lime, behaviour before the blow- 



pipe, 31 

 efferves 



Fervescence in acid of car- 

 bonate of, 31 

 phosphate of, 88 

 Limestone, 14 



galena in carboniferous, 69 

 mountain, 17 

 nature of, 101 

 Limonite, 64 

 Loam, 14 

 Lodes, age of, 3 

 direction of, 3 

 nature of, 20 



position of shafts with regard 

 to, 139 



tyTAGNESIA, test for, 31 

 ' Magnetic iron ore, 64 

 Malachite, 48 



Malay Archipelago, tin in, 81 

 Manganese, bog or wad, 70 



black oxide of, 69 



tests for, 28, 70, 109 

 Manica, gold in, 60 

 Marble, 14 

 Marl, 14 



Mashonaland, gold in, 60 

 Matrices of veins, 7, 104 

 Matrix, honeycombed, 7 

 Measurement of the dip, 22 



of distance, 132 

 Mercury, chloride of, 71 



native, 70 



selenide of, 71 



sulphide of (cinnabar), 70 



flouring of, 9, 53 



tests for, 29, 71, 109 



to obtain metal from an ore 



of, 71 



Metamorphic rocks, 13 

 Mica, mistaken for gold, 50 



nature of, 102 



schist, 13 



