180 Scientific Intelligence. 



9. Compact gray, almost earthy limestone from Timor, from the 

 expedition of Captain Baudin. Spec. grav. 2.60. This gray variety 

 is mixed with another which is hrown, and becomes brown itself on be- 

 ing calcined. 



10. Brown opaque calcareous spar, from Mou tiers, cleavable in rhom- 

 boidal laminae, occurs with No. 6. Spec. grav. = 2.64. Its colour is 

 owing to an incipient decomposition. 



11. Limestone from Devonshire. 



12. Calcareous spar, from Notre-Dame-du- Pre, in Savoy. Cleavable, 

 of a violet-blue colour. Spec. grav. = 2.9. This variety seems to con- 

 tain free oxide of iron, as its carbonic acid is not sufficient for saturat- 

 ing all the bases. 



13. Calcareous spar, from Pezey in Savoy. Crystallized in the primi- 

 tive rhombohedron. White, semi-transparent, of a lustre approaching 

 to pearly. Spec. grav. =2.94. 



Its surface becomes brown on being exposed to the moist atmosphere. 

 It would be interesting to know from the indication of the angles of the 

 rhombohedron, of hardness, &c. joined to that of specific gravity, whether 

 the two last varieties do not belong to some of those species which have 

 lately been separated from the real calcareous spar. 



14. Granular yellowish- white, or grayish- white calcareous spar, with 

 a pearly lustre, from Framont, in the department of the Vosges, where 

 it accompanies the hydrate of iron. Analysed by M. de Beaumont. 



15. Sparry iron, from Allevard. Cleavable in large laminae, of a 

 pale colour, which are perfectly homogeneous. 



16. Sparry iron, from Autun. Cleavable in large laminae, of a pale 

 colour. 



17. Small-grained sparry iron, from Allevard, mixed with quartz. 



18. Sparry iron, from St. George de Huntieres, in Savoy. Small- 

 grained, of a very pale colour. 



19. Kidney-shaped clay iron-stone, from la Voulte, Ardeche. Com- 

 pact, gray in the interior, and red on the outside. Spec. grav. =3.08, 

 Analysed by M. Lame . 



20. Kidney-shaped clay-iron stone, from Martigues, Bouches-du- 

 Rhone. Compact, earthy, consisting of alternating parallel layers of 

 a yellowish and grayish colour. 



21. Compact sparry iron, from Chaillaud, Dep. de la Mayenne. 

 This variety occurs in a mine worked for brown iron-ore, in kidney- 

 shaped masses, called conillards, and thrown away by the workmen, as 

 containing no iron. It is red on the outside, but dark gray, nearly 

 black within. The fracture is very fine grained, and conchoidal. Spec, 

 grav. = 3.58. It acts very distinctly upon the magnetic needle. It 

 seems to contain 2.5 per cent of the magnetic oxide of iron. The dark 

 colour of the mineral is owing to bituminous matter. 



22- Compact yellowish-gray magnesian limestone, from Elba, of an 

 earthy fracture. 



23. Rose-coloured carbonate of manganese, from Nagy-ag. Cleavable 

 and translucent on the edges. 



