448 Hawkins — Mineral Occurrences at Princeton^ N. J. 



It will be noted that several of the forms (new forms are 

 starred *) are new to the species. Especially noteworthy are 

 the brachydomes, which fill in some of the gaps in the previ- 

 ously known series of these forms as follows : 



((001)), (025),* (012), (089), (011), (043), (021), (041),* ((010)). 



The harmonic series of symbols is apparently series N 4 of 

 Goldschmidt : 



(1/4), (1/3), (2/5), (1/2), (3/5), (2/3), 



1, (4/3), (3/2), (5/3), 2, (5/2), 3, 4, inf. 



Other new forms are the prism (230) and the doubtful pyra- 

 mid if (313). 



AH the brookite crystals so far found have come from a 

 brecciated zone at Matthews' quarry, in the west end of 

 Princeton. 



llmenite. — Rosettes, of all sizes up to *8 cm in diameter, com- 

 posed of brilliant black hexagonal places arranged in nearly 

 parallel position, giving an appearance similar to that of the 

 "eisenrosen" found in Switzerland and elsewhere. Specimens 

 from Princeton show onlv three forms, as follows : c, (0001) ; 

 m, (1010) ; a> (1120). 



Specimens from Byram, however, are richer in forms : 



-Dana- 



-Goldschmidt- 



Calculated. Measured. 



Letter. Symbol. Letter. Symbol. 



(0001) 

 (1120) 

 (1010) 

 (12.3) 

 (1011) 

 (0112) 

 (2243) 



(0001) 

 (1010) 

 (1120) 

 (1011) 

 (1121) 

 (1122) 

 (2021) 





 30 00 





 30 00 

 30 00 









 90 00 

 90 00 

 42 42 



57 58 

 38 38 

 61 33 





 30 00 





 30 00 

 30 00 









 90 00 

 90 00 

 42 30 

 58 07 

 38 38 

 6137 



Prominent 



Prominent 



Minute 



Minute 



Prominent 



Fair 



Distinct 



Fig. 3 shows a crystal with the above forms. llmenite of 

 this type, showing the rosette arrangement, has been found in 

 the quarries in the argillite at the east end of Princeton ; in 

 the Traction Co.'s quarry on the Pennsylvania side of the 

 Delaware River in the vicinity of Scudders Falls ; with massive 

 analcite in the brook bed near the railroad station at Byram, 

 IS. J. ; and in the railroad cut and argillite quarry near Rush- 

 land, Montgomery Co., Pa. llmenite also occurs at Princeton, 

 and at Byram in the form of flat plates with bluish metallic 

 lustre and rough outlines. 



Analcite. — In the Princeton quarries, simple isometric form 

 most typical of this species, the tetragonal trisoctrahedron or 

 trapezohedron (211). At Byram, Hunterdon Co., N. J., white, 

 cleavable masses, two inches thick, filling seams, in the brook 



