A. J. Moses — Crystallization of Luzonite. 283 



and four are new domes ,#=102, 2=103, Z=203 and Z=203. 

 The following angles give the proofs for these previously un- 

 recorded and new forms : 



Measured p. Calculated p. 



■ M=101. __ 34° 351 34° 18' 



^-102 19° 19' 19° 12|' 



J=203._ 24° 50J' 24° 55' 



T=\_02> 13° 16| 13° 4f 



Z=203 24° 13' 24° 27' ' 



For the pyramid p = 112 



Measured angles <£ = 31° 18' p=33° 30' 



Calculated angles <£ = 32° o£' p = 33° 3o|' 



The occurring forms and their relative development may be 

 judged by the following tabulation. The forms in the first 

 column are in most cases composed of fine relatively large 

 faces; the largest^ however, being the three pinacoids and the 

 three domes 102, 101, 203. All of these domes are new to the 

 locality. 





Faces yielding 



Faces yielding 



Faces yielding 



Type. 



fine signals. 



good signals. 



faini 



signals. 



Pinacoids. 



. 001, 010, 110 













M-0 



110, 210 



310 







Old 



_ . 



011 









hOl 



102, 101 



203 





103 



hOl 



l01, 203 











hkl 



_ .... 121, 321 



111, 112, 123 



141, 



323, 521 



hkl 



121, 321 



111, 123 





521 



4. Hematite Parting from Franklin Furnace, N. J. 



A mass of ore from Franklin Furnace, N. J., weighing 

 about two pounds, consisted principally of hematite with a 

 very marked rhomboheclral parting. With the hematite was 

 calcite also showing a parting (parallel to 0112) and enclosed 

 within the calcite was a broken crystal about one inch in diam- 

 eter which consisted of a well-defined crust of hematite with 

 the parting, the red streak, the very feeble manganese and very 

 weak magnetism ; and a core of franklinite with different luster, 

 no parting, brown streak, decided manganese reaction and 

 decided magnetism. 



For record the nearly cubical parting was measured. The 

 signals are not bright and there is a little calcite between the 

 parting surfaces. Two angles of a fragment yielded respect- 

 ively 94° 35', 93° 52' or an average of 91° 13' '. The unit 

 rhombohedron angle of hematite is 91° 0'. 



