M I N KKAI.i ti ; KA 1, M 'IKS A N hKIJSON . 



ir, 



The followiii- angular nieasuren.ents were oblaiuu.l fn.n. lour 

 crystals : — 



Near Glen luues, N.S.Wales. 

 (PI. iii., tig. 3.) 



A small but very attractive specimen "^ f^,^^^''^^^^;;^'^;'" ^^^^ 

 obtained in a vugl. during the sinking of a well through basa t. 1 he 

 crysals^^^^^ brilliant, of a pale wine-yellow colour and are seated on a 

 ba^e of chabazite cr'ystalsVl- v., Hg- D- The - -^e -ysU ^ wh.ch 

 are never doubly terminated, measure up to about 1 cm m length, an 

 are constant m habit. Of the forms present M (404 ) has very smal 

 faces, or may be absent altogether ; the faces of r (1011) are brilban and 

 give flawless signals, but n (lUO) Papers and is str.atedpara^^^^^^^^ 

 Fntersections with r. The curious lozenge-shaped surface with ^nangulai 

 markings does not give a sharp reflection, p varying from 66 44 o 

 67° 5'- this would indicate Goldschmidt's /.• (5-5-10-2), corresponding to 

 Dana's q (0552), but the face is more likely to belong to Goldschmidts 

 <t> (2241) = Dana's f (0221), for which p =. 63° 7' the <^i«erepancy in 

 The angle being due to the poor quality of the reflection. The face is 

 covered with overlapping triangular plates. 



The forms and angles obtained are tabulated below ;— 



Form. 



Measured. 



Calculati'd. 



Goldschniidt Dana 



85 2 

 44 3() 

 75 4<) 

 6U 55 



