70 



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 











/ 







1 











/ 



/ 



'm:a 



no :iio 



45 



I 



45 







p:p"' 



III :iii 



56 



42 



56 40 



m'-m! 



I ID :iio 



90 



I 



90 







u:u"' 



331:331 



76 



13 



76 29 



m:u 



110:331 



20 



16 



20 



I2i 



a:x 



110:311 



31 



So 



31 43 



m:v 



110:221 



29 



5 



28 



54 



a:p 



110:111 



61 



38i 



61 40 



vn:p 



110:111 



47 



43 



47 



50 



x:x^" 



311:311 



32 



45 



32 57 



p:p" 



111:111 



84 



25 



84 



20 













u:u" 



331:331 



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 marmolite 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 (m) 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 (loi), r (loi) and n (iii). 





Angle 



Measured 



Calculated 





Angle 



Measured 



Calculated 











/ 



/ 







/ 



/ 



c:a 



001 :ioo 



64 



34 



64 37 



a:e 



100:101 



29 45 



29 54 



c:r 



001 :ioi 



63 



34 



63 42 



n:n"' 



111:111 



70 26 



70 29 



a:r 



100:101 



52 



II 



Si 41 



u:u' 



210 :2io 



109 7 



log I 



