‘ 
18 On Light. 
Colour and Intensity of f 
the Light. 
Fluor spar, 
Blueish-white, 
Yellowish, 
Compact fluor, 
Sandy fluor, White, White sparks. 
Calcareous spar, Yellow, Yellow. 
Transparent, Yellowish. 
Limestone from north 
of [reland, 
Phosphate of lime, 
Yellowish-red. 
Yellow. 
Pink, 
Arragonite, Dirty white, Reddish-yellow. 
Carbonate of barytes, |Whitish, Pale white. 
Harmotome, Colourless, Reddish-yellow. 
Dipyre, White, Specks of light. 
Grammatite from Glen- 
tilt, 
Corn- 
wall, 
Topaz, Aberdeenshire, 
——-, Brazilian, 
——.-, New Holland, 
Rubellite, 
Sulphate of lime, 
- of barytes, 
Yellow 5 
Pale light. [bright. 
Slate colour, 
- strontites, |Blucish, A fragmentshone pretty 
- lead, Transparent, Faint and by fits. 
Anhydrite, Reddish, Faint light. 
Sodalite, Dark green, Pretty bright. 
Bitter spar, Yellowish, Faint white. 
Red silver ore, Red, Pretty bright, but flit- 
Barystrontianite, White, Faint. - | ting. 
Arseniate of lead, Yellowish, Bright white. 
Sphene, Bright white. 
Tremolite, Reddish-yellow. 
‘Mica, Whitish 
—— from Waygatz, i 
Titanium sand, 
Feeble specks. 
Hornstone, 
Yellowish. 
Table spar, Dognatska,|Whitish, Yellowish. 
Lapis lazuli, Blue, 
Spodumene, Greenish, 
Titanite, Reddish, 
Cyanite, Y ellowish-white, 
Calamine, Brown, 
Augite, Green, 
Petalite, Reddish tinge, Blue and very bright. 
Aabestus, rigid, —___.____ Pretty bright. 
Datholite, Transparent, | Bright. 
TABLE con- 
