39 



Specimen No. 1. is the unaltered limestone, as pure a specimen to 

 the eye as could be selected. 



No. 2. is a saccharine marble, crumbling readily into powder. 



No. 3. is the most altered specimen in this locality, described 

 above as "a pure white marble, translucent on the edges," &c., and 

 which turns out to be table spar. 



No. 4. is a carefully picked specimen of the same, free from car- 

 bonate of lime. 



No. 5. is a calcareous sandstone, altered by contact, scarcely 

 distinguishable from No. 2. 



No. 1. 



Carbonic acid, 42*40 



Lime...... 54'58 



Silica, 0-70 



Magnesia, 0'40 



Water and loss, 1*92 



100-00 



No. 2. 



Carbonic acid, 42-52 



Lime, 54-68 



Insoluble siliceous matter, 1*14 



Magnesia, ...a trace. 



98-34 

 No. 3. Spec. Grav. 2-88 



Silica, 47-50 48-00 46-64 49-38 



Lime, ; 44-90 45'40 46-27 44*59 



Protox. of ironl K , A 1-61 -, AA * An 



and alumina, } 5 ' 40 201 1<44 1>49 



Water, 0'80 0-80 0'80 1-60 



Magnesia,..., 0'70 0'83.. 1-05 



Soda, ....... 0-92 -94 



Carbonic acid and ) 4-85 -QK 



loss, 5 



99-30 99-57 100-00 100- 



No. 4. 



Silica, 49-380 In atoms this is 



Lime, 44*596 Silica, 24-89 1*93 



Alumina and protox. of) ^.490 Lime, 12'74 1 



iron, ) And the formula is, omitting 



Soda, '936 the impurities 



Magnesia, 1-050 CaO,2SiO, 



Water, 1-600 or Bisilicate of lime. 



99-052 



