6 4 



NEW YORK STATE MUSEUM 



being dissolved and its subsequent appearance with calcite crystals, 

 of a later generation, which latter are characterized by an unusual 

 series of second order pyramids seems to connect, beyond question^ 

 the pyramidal habit of calcite with a crystallizing solution satu- 

 rated or nearly saturated with silica. 



SUMMARY OF DISTRIBUTION OF FORMS 



Letter 



Indexes 



Type I 



Type II 



Type III 



Type IV 



Type V 





Tt 



1123 









+ 







r 



2243 







+ 



+ 



+ 





oc 



4483 











+ 





r 



8.8.16.3 







+ 



+ 







M 



4041 



+ 













r 



ion 



+ 













I 



0445 







+ 





+ 





A 



0443 









+ 



+ 





T 



0.19. 19. 13 





+ 



+ 







New 



f 



0221 











+ 





E 



0-13 13-4 



+ 











New 



A 



0772 











+ 





2 



0. 11 . 11 . 1 











+ 





V 



2131 







+ 



+ 



+ 





M 



549 1 



+ 







+ 







W: 



14. 12.26.5 







+ 



+ 





New 



Ri 



8.4. 12 . 1 











+ 





CI: 



2461 





+ 





+ 



+ 





C : 



347i 











+ 





SUMMARY OF MEASURED AND CALCULATED ANGLES 



Letter 



Indexes 



Type 



Angle 



f 

 fee 

 •9 3 



55 



Measured 



Calculated' 

















/ 







/ 



It 



1123 



IV 



1123:2113 



6 



28 



15 



28 



39 







IV 



1123:8.8.16.3 



1 



47 



37 



47 



57 



T 



2243 



III 



2243:4223 



2 



44 



2 



44 



8^ 







IV 



2243:4223 



1 



44 



12 



44 



8^ 







V 



2243:4223 



2 



44 



10J 



44 



8* 







III 



2243:8.8.16.3 



6 



28 



48 



28 



54 







IV 



2243:8.8.16.3 



3 



28 



52i 



28 



54 



oc 



4483 



V 



4483:8443 



1 



54 



23 



54 



30 







V 



4483:2131 



2 



10 



26 



10 



27 



