60 On the Homoeomorphism of Mineral Species 



TABLE III. A. 



species annexed to sections II. and III. of Table II. The 

 cleavage constitutes the main reason for regarding the species 

 as a separate Group. But notwithstanding the peculiarity in 

 this respect, the affiliation with Sulphur and Orpiment is un- 

 doubted. 



TABLE IV. 



Angle of Vertical Prism, near 120° (115£°-120°). 



I. 



Sternbergite, . 



II. 

 Aragonite, 

 Cerusite, . 

 Witherite, 

 Bromlite, . 

 Stephanite, 

 Nitre, . . . 

 Chrysoberyl, . 

 Discrasite, . . 

 Copper Glance 

 Stromeyerite, . 



III. 

 Horderite, . . . 



IV. 



lolite, 



Mica, 



Prism 



119° 30' 



116° 

 117° 

 118° 

 118° 

 115° 

 118° 

 119° 

 119° 



119° 35' 



115° 53' 



119° 10' 

 119°-120° 



Dome 

 H. 



69° 38' 



81° 40' 

 80° 19' 

 77° 30' 

 77° 18' 

 85° 5' 

 80° 16' 

 (§7) 78° 54' 

 81° 22' 



(fi.) 83° 56' 



111° 42' 

 94° 



Dome 

 11. 



100° 2' 



108° 26' 

 108° 16' 

 106° 54' 

 107° 5' 

 111° 8' 

 109° 57' 

 (10 109° 38' 

 112° 12' 



114° 10' 



133° 58' 

 121° 38' 



Axes 

 b : 



1.4379 : 1 : 1.7147 



1.1571 

 1.1852 

 1.2460 

 1.2504 

 1.0897 

 1.1861 

 1.2152 

 1.1633 



1.1117 



1.6055 



1.6388 



1.6808 



1.6920 



1.5844 



1.692 



1.7239 



1.7315 



1.7176 



0.6783 : 1 : 1.5971 

 0.9325 : 1 : 1.7033 



In Table IV. we recognise four sections 

 I. Angle of macrodome near 70° 32'. 



