OHDER I. BLACK MIXERAT.-RESIN. 50 



has been found also, generally engaged in bituminous wood, 

 in Sicily, in Spain, near Paris in France, in Greenland, in 

 China, and other countries. 



5. It is cut into various ornaments and works of art, it 

 enters the composition of certain kinds of varnish, and 

 serves for fumigation. Considerable value is attached to 

 large specimens which are transparent. 



2. BLACK MINERAL-RESIN. 



Black Mineral Resin. JAM. Syst. Vol. III. p. 481. Man. 

 p. 298. Mineral Oil. Bitumen. Mineral Pitch. PHILL. 

 p. 366. 368. Erdol. Erdpech. WEKN. Hoffm. H. B. 

 III. 1. S. 266. 270. IV. 2. S. 137. Bergpech. Elaterit. 

 Bergtheer. Naphtha. HAUSM. I. S. 85. 87. 88. 89. 

 Erdfll. Elaterit. Asphalt. LEOXH. S. 678. 680. 681. 

 Bitume. HAUY. Traite', T. III. p. 310. Tabl. comp. 

 p. 70. Traite, 2de Ed. T. IV. p. 452. 



Aggregation solid, or fluid, and all the intermediate 

 stages. No regular form. Stalactitic shapes : 

 surface smooth. Massive. 



Fracture conchoidal, more or less perfect, uneven. 



Lustre resinous. Colour black prevalent, but pas- 

 sing also into various brown and red tints. Fluid 

 varieties are sometimes perfectly colourless. 

 Streak commonly unchanged, sometimes lighter 

 than the colour. Translucent on the edges, 

 opake ; some fluid varieties are transparent. 



Sectile, malleable, elastic. Bituminous odour. 

 Hardness = 0-0 ... 2-0. Sp. Gr. = 0-828, 

 brown, malleable; nr 1-073, black, slaggy; 

 1-1 GO, hyacinth-red, slaggy. 



OBSERVATIONS. 



1. Mineral Oil and Mineral Pitch, generally considered 

 as two distinct species, are included hi the black Mineral- 



