■chroism is perceptible, though not specially strong. The 

 homogeneity of the mineral is only disturbed by some fluid 

 inclusions and steam pores. Where the axinite protrudes 

 into the clear quartz it gives very sharp sections of its small 

 crystals. 



" 2. Plenty of monoclinic augite, greenish-yellow to colour- 

 less. Many of these small sharply contoured augites show 

 pinacoidal surfaces, and such sections have parallel cleavage 

 cracks. Extinction angle about 45deg. 



u 3. Dark-green hornblende, not so plentiful as augite. 

 Very fibrous and pleochroic, sometimes in transverse sections, 

 extinction angle about 17deg. Often hornblende and augite 

 are so related that one is inclined to believe that the former 

 issued from the latter. In the large light-coloured long 

 sections of augite you often see dark green fibrous hornblende 

 patches, and both merging into one another without sharp 

 boundaries. If it is here probable that the hornblende 

 belongs to uralite, the proof of it has not been found, viz., 

 in hornblende with augite cross sections. 



11 4. Water-clear quartz, with fluid inclusions and movable 

 bubbles. In the quartz are little crystals of augite and 

 titanite. 



" 5. Carbonate of lime, with sharp rhombohedral cleavages ; 

 quartz and carbonate of lime where they touch each other 

 are always separated by quite rectilinear boundaries ; in the 

 lime are also augite grains. 



" 6. Pale brown-grey titanite in wedges, usually several 

 crystals together. 



" 7. Ores. — Iron pyrites and magnetic iron. 



" The axinite forms 60 per cent, of the rock, augite and 

 hornblende 30*35 per cent., and lime 105 per cent. Axinite 

 seems to be the basis of the rock, but parts of it are so 

 traversed by augite and hornblende that these seem to form 

 the rock. Quartz and lime are only sporadic, and look as if 

 they only filled holes in the rock, though they are probably 

 primary constituents, The rock is characterised by the 

 absence of felspar, also of mica chlorite, or a lime mineral. 

 Petrographically it is a rock quite as typical as eklogite or 

 cherzolite." 



In a letter dated October 17, 1896, Professor Zirkel writes : 

 — "According to the latest observations of M. Lacroix in 

 Paris (Comptes rendus CXIV., 1892, 955), this limurite 

 geologically does not belong to the series of crystalline slates, 

 but forms small veins in the metamorphic palaeozoic lime- 

 stones and the adjoining granites, it must be considered as a 

 product of the granitic action, and is, as topaz, tourmaline, 



