7o 



NEW YORK STATE MUSEUM 



The results obtained from the measurements of eight of the best 

 crystals are given below: 





Angle 



Measured 



Calculated 





Angle 



Measured 



Calculated 











' 







/ 











/ 



/ 



m:a 



no :no 



45 



1 



45 







p: P "> 



111:111 



56 



42 



56 40 



m:m' 



no :no 



90 



1 



90 







| u:u'" 



33i:33l 



76 



13 



76 29 



m:u 



110:331 



20 



16 



20 



I2i 



a:x 



110:311 



31 



5o 



3i 43 



m:v 



110:221 



29 



5 



28 



54 



a:p 



110:111 



6l 



3§i 



61 40 



m:p 



110:111 



47 



43 



47 



5o 



x:x*" 



311:3" 



32 



45 



32 57 



P :p" 



111:111 



84 



25 



84 



20 













u:u" 



33 I "33i 



139 



35 



140 



35 













v:v" 



221 :22i 



122 



57 



122 



12 













Epidote 



Epidote occurs in irregular strings scattered through the ortho- 

 clase of the pegmatitic phase of the wall rock and usually in close 

 association with light gray massive wernerite. In several instances 

 phenocrysts of amphibole in a wernerite matrix were noted which 

 showed a distinct rim of epidote indicating a probable derivation 

 of the latter mineral from a previously deposited amphibole. 

 Measurable crystals were obtained from small veins, where they 

 occurred deposited on a thin layer of bluish green m'armolite and 

 partially imbedded in massive calcite which constituted the ulti- 

 mate vein filling. These crystals which average 3 mm in length 

 show no unusual development in crystal forms or habit. Figures 

 2oa-2ob show this habit, to which all the crystals studied con- 

 formed with great regularity. The planes of the zone [100. 001] 

 are sharp and brilliant although frequently marred by vicinal 

 striations. In many instances the crystals are somewhat bent. 

 The planes of the hemipyramid n (in) are rough and dull while 

 those of the prism u (210) although extremely small are well marked 

 and bright. The following forms were noted: a (100), c (001), 

 u (210), e (101), r (101) and n (in). 





Angle 



Measured 



Calculated 





Angle 



Measured 



Calculated 



c:a 

 c:r 

 a:r 



001 :ioo 

 001 :ioi 

 100:101 



/ 

 64 34 



63 34 

 52 11 







64 

 63 

 51 



/ 



37 



42 

 41 



a:e 



n:n"' 

 u:u' 



100:101 



111:111 



2IO I2IO 



/ 



29 45 



70 26 



109 7 



/ 



29 54 



70 29 



109 1 



