VOL. XLV.] 



PHILOSOPHICAL TRANSACTIONS. 



547 



Tutia. Muschenb 4.6l5 



Lapis Calaminaris. Freind. Lapis caeru- 



leus Naraurcensis. Muschenb 5.000 



Id. Boyle 4.9'20 



Loadstone. Boyle V. 6, b 4.930 



Magnes. Petit 4.875 



A good loadstone. Harris 4.750 



Marcasites, one more shining than ordi- 

 nary. Boyle 4.780 



A golden marcasite. J C 4.58y 



Marcasites from Stalbridge. Boyle . . 4.500 

 D° Boyle 4.450 



Antimonium Hungaricum. Muschenbr. 4.700 

 Antimony, good, and supposed to be 



Hungarian. Boyle 4 070 



D° crude, which seemed to be very good. 



Harris 4.058 



Antimonium crudum. Freind 4.000 



Id. Davies 3.96O 



Black sand, commonly used on writing. 



Boyle. V. 33, l> 4.600 



Crocus metallorum. Muschenb 4.500 



Id. Freind 4.444 



Haematites. Muschenb 4.360 



Id. Boyle. V. 6, a 4. 150 



D" English Boyle... 3.760 



Copper ore, rich. Boyle 4.170 



D° Boyle 4;i5o 



Copper-stone. Boyle 4.090 



Emeri. Boyle. V. 26, b 4.0OO 



Manganese. Boyle 3.530 



A blue slate with shining particles. J. C. 3.500 

 Iron ore, a piece burnt or roasted. Harris 3.333 

 Cerussa. Item chalybs cum sulphure. pp. 



Freind 3.158 



Lapis lazuli. J. C 3.054 



D° Boyle. V. 6, b 3.000 



D° Boyle 2.980 



Gold ore. Boyle V. 29, b 2.9 10 



D° not rich, brought from the East In- 

 dies. Boyle 2.652 



Another lump of the same. Boyle .... 2.634 

 A mineral stone, yielding 1 part in 160 



metal J. C 2.650 



The metal thence extracted. J. C. . . . 8.500 



Pyrites homogenea. Fahrenheit 2.584 



Black lead. Boyle. V. 27, a 1.860 



jEs viride. Freind 1.714 



Plumbum ustum. Freind 1.666 



TABLE III. — Of Gems, Crystals, Glass, and Transparent Stones. 



Granate, Bohemian. Boyle 



Granate. J. C 



Granati minera. Boyle 



A pseudo topazius, being a natural pellu- 

 cid, brittle, hairy stone, of a yellow 



colour. Newton. C 



Sapphires. Davies 



A sapphire very perfect, but rather pale. 



Hauksbee 



Glass, blue in sticks from Mr. Scale. 



Hauksbee 



D" whitest, from Mr. Scale. Hauksbee 



. . clear crystal. Cotes 



. . blue plate, old. Hauksbee 



. . plate. L 



. . old looking-glass plate of a light co- 

 lour. Hauksbee 



, . green. Freind 



. . green bottle. Hauksbee 



.. of a bottle. Oxf. Soc. It. a blue 



paste. Hauksbee 



. . common green. Hauksbee 



. . deep green old. Hauksbee 



. . vulgar. Newton. Ward 



Vitrum venetum. Freind 



An oriental cat's-eye, very perfect. Hauksb. 

 A diamond, yellow, of a fine water, some- 

 what paler than the jonquille. 



Hauksb 



D° white of the second water, eau ce- 

 leste. Hauksbee 



4.360 A diamond. East Indian, the heaviest 



3.978 of many. Ellicot 3.52s 



3.100 .. the lightest of many. Ellicot.... 3.512 



. . Brasilian, the heaviest of many. 



Ellicot 3.521 



4.270 .. the lightest of many. Ellicot 3.501 



4.090 .. the mean of all his experiments. EUic. 3.517 



. . Newton. C 3.400 



4.068 Diamond bort, of a bluish black, with 



some little adhering foulness. Hauksb. 3.495 

 3.885 A jacinth of a fine colour, but somewhat 



3.380 foul. Hauksbee 3.637 



3 150 A chrysolite. Hauksbee 3.360 



3.102 Crystal cubic, supposed to contain lead.. 

 2942 Woodward 3.100 



Crystal from Castleton in Derbyshire, 

 2.888 having the double refraction. Hauksb. 2 724 



2.857 Crystal of Island. Newton. C 2.720 



2.746 Crystallum disdiaclasticum. J. C 2.704 



Crystallus de rupe. Fahrenheit 2.669 



2.666 Crystal rock. J. C. Boyle III. 229, b. 2.659 



2.620 D° a large shoot. Hauksbee 2.658 



2.587 . . of the rock. Newton. C. Id. 



2.580 Crystal in the lead mines nearWorks- 



1 .791 worth. Woodward 2.650 



3 703 . . Hauksbee 2.646 



. . Pure pyramidal, supposed to contain 



tin. Woodward 2.5, or 2.400 



3.666 Crystallus. Petit 2.287 



Crystal. Boyle 2.210 



3.540 Talc, Jamaican. Boyle 3.000 



4 A 2 



