VI 



GENERAL INDEX. 



N 



Nam-do . 



Names of mica . . 

 Narukot . 

 Natural percussion -figures 



„ pressure-figures 

 Nellore 

 Nilgiris 



Non-conducting properties 

 North Arcot 



PAGE. 



14 

 12—14 



53 

 20 

 20 

 58 

 <?5 

 74,75 

 67 



Objects of paper 

 Ophicalcite . . 



Origin of name muscovite 



„ pegmatites . 



Ornamental uses of mica 

 Overhand stoping 



11, 12 



41 

 72 



33 

 75.76 



84 



Pegmatite, affected by surrounding rocks . . 







. . 38 



,, composition of . . . . . 







• 3C 3 1 



„ definition of .... , 







30 



„ forms of ..... , 







35 



„ origin of . . . 







33 



„ possible connection with "dome-gneiss " 







.47.48 



Percussion-figures ...... 







. 17,18 



„ at high temperatures . 







21 



Pleochroism of micas ..... 







22 



Potstone ........ 







. 41,61 



Powell, B. H. 







68, 114 



Pressure-figures ...... 







18 



Prices of mica ....... 





e 



i,92,93> i° 2 



Production of Indian mica ..... 







95 



Prospects of Bengal mica-belt .... 







. 46 



„ Nellore „ .... 







. 63 



Prospecting rules ....... 







. 96 



Pulverised mica 







74 



Punjab ........ 







68 



Pyroxene-granulite ....... 







40 



