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in every part of the world ; as well as from the admixtures, fepta?, and cements of the 

 fame kind, frequently obferved in many of the other productions. 



The following genus feem to comprize the principal appearances of this kind. 



Album diaphanum particulis rhombeis compreffis. 



Pellucidum varie cryftallizatum. 



Pellucidum objecJa duplicans. 



Iceland cryftal. 



Striatum trifariam imbricatum. 



Hemifphericum* 

 Micaceum. 



SPATUM 



Spate , or Spar, 



\ 



Lapideum phofphoram fubpellucidum ; 

 Gypfeum angular e truncatum, 

 Gypfeum cuneiforme fubpellucidum. 







1 o . Rupejlre fubpellucidum £f fubcryftallizatum: 



The Spar is always tran/parent, and commonfy round /hooting into regular figured 



of an oblong, rhomboidal, 



or cubical form, which always divide and fubdivide into 

 fmaller pieces of the fame figure before they yield intirely to the fire. It is mod fre- 



uently found in the fiffures of rocks, and then is chiefly compofed of rhomboidal 

 ragments clofely cemented together. But it is often obferved in large mafles, and 

 fometimes forming whole ftrata ; or {hooting into regular cryftalline figures of a 

 pointed or pyramidical form : it is eafily known by its tranfparency, and the crack- 

 ling noife that attends its feparation in the lire ; and is obferved to yield eafily to 

 all acids of force. 



The more compound fubftances of this nature are very numerous ; and always an- 

 fwer the peculiar character of the matrix from whence we fuppofe them originally 

 derived. ^^pp» w 



The moft noted genus's of the kind are, 



1 . Cretaceus cruftatus. 

 The ftalagmite. „ 



2 . Marmoreus tunicato- crujlaceus apice nitrofo. 

 The Stalactite. 









^.STALACTITES 



Stalaclite. 







3. Marmoreus ramofns, 



4. Marmoreus albidus varie fplendens, 



5 . Subdiaphanus marmoreus. 



6. Subfujcus glabertunica cretacea obduffuus. 





The Stalactite feems to be but a meer fparry, or felenetic matter, varioufly debafed 

 with a lefs agitated marly fubftance : it is generally of a glittering appearance, and 

 many of the fpecies take a fine polimj but all the forts yield with great eafe to both 

 the fire and the acid . 







1. 

 2. 



3 



2 . MARMOR 



Marble. 



Varie nebulatum & maculatum, maculis majoribus. 

 Variegatum, & quajifaponaceum. 



The foapy rock. 



Solubile particulis impalpabilibus rafilibus. 



Hujus varietates funt. 

 I . Pari us t album : 2 . Phrengiftes, favum : 3 . Ver- 

 dello t viride : 4. Lucullum, nigrum : 5. JNumidi- 

 cum> rufum : 6 . Venetum, cinereum : 7. Africa- 

 num, maculatum album: 8. Canarienfe, nigrum: 

 9. Lace demoni urn t viride : 10. Lejbium, purpu- 

 rafcens: 1 1. Porta fanfta, luteum : 12. Poly rizos 



zoms varus. 









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2 . MARMOR 



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