Crystallographic Notes by Pen-field and Pirsson. 397 



■c. Axinite, from McKay^s Brook, which empties into the N. E. 

 Mirimichi River, Northumberland Co., N. IS. 



Only one small fragment of about 15 X 10 mm in size, received 

 from Mr. Samuel Hufty in Camden, N. J., consists of very 

 small brown and brownish gray tabular crystals, arranged to form 

 a somewhat columnar granular rock. The crystals are too im- 

 perfect for satisfactory measurements, a qualitative chemical 

 examination proves the mineral to be axinite. 



2. On Eudialyte from Magnet Cove, Ark. 



The material for this and the following mineral was also 

 kindly furnished by Messrs. Geo. L. English & Co. 



The following observations on the eudialyte from Magnet 

 Cove had been made when we received the article on eudialyte 

 and eucolite from Magnet Cove, by J. Francis Williams, in the 

 December number of this Journal, 1890. The crystals agree 

 in every respect with the description given by_ Williams. Only 

 the simple forms c, 0001, ; r, 1011, 1 ; e, 0112, -J and a, 1120, 

 i-2, were observed. These were developed as shown in fig. 3. 

 One crystal about 2| mm in diameter was 

 measured in which the mean of six inde- 

 pendent measurements of c^e=50° 44', 

 and five of c^r=67° 35'. Williams cal- 

 culates for these 50° 43' and 67° 45|' 

 respectively, using a : <?■== 1 : 2-1174. 



The analyses from a want of crystal- 

 lized material had to be made with the 

 massive rose-colored of lighter and deeper shades, scarcity of 

 either prevented making separate analyses of each ; examina- 

 tion under a strong lens showed no impurity. Sp. gr. — 2*810. 



The analyses gave : 







i. 



2. 



Ignition 



= 1-88 



1-84 



CI 





1-42 



1-41 



Si0 2 





51-83 



51-68 



Zr0 2 





11-45 



11-62 



Ta 2 B 



(?) 



0-39 



0-29 



FeO 





4-37 



4-35 



MnO 





0-37 



0-30 



M^O 





011 



• 0-07 



CaO 





14'77 



15-05 



STa 2 





13-29 





K 2 





0-43 







100-31 



The material for these analyses was not as good as desirable. 

 It was obtained from the massive variety, occurring in rounded 



