64 



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 





TC 



II23 









+ 







r 



2243 







+ 



+ 



+ 





OC 



4483 











+ 





r 



8.8.16.3 







+ 



+ 







M 



4041 



+ 













r 



lOII 



+ 













I 



044S 







+ 





+ 





A 



0443 









+ 



+ 





T 



0.19. 19. 13 





+ 



+ 







New 



f 



0221 











+ 





E 



0.13 13.4 



+ 











New 



J 



0772 











+ 





2 



0. II . II . I 











+ 





V 



2131 







+ 



+ 



+ 



> 



M 



S491 



+ 







+ 







a; 



14. 12 . 26. 5 







+ 



+ 





New 



R = 



8.4. 12. I 











+ 





CJ: 



2461 





+ 





+ ■ 



+ 





C : 



3471 



' 









+ 





SUMMARY OF MEASURED AND CALCULATED ANGLES 



Letter 



Indexes 



Type 



Angle 



•-M 



Measured 



Calculated 











r- 

























/ 







/ 



7t 



I123 



IV 



1123:2113 



6 



28 



15 



28 



39 







IV 



1123:8.8.16.3 



I 



47 



37 



47 



57 



r 



2243 



III 



2243:4223 



2 



44 



2 



44 



8f 







IV 



2243:4223 



I 



44 



12 



44 



8^ 







V 



2243:4223 



2 



44 



loj 



44 



8i 







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 



I 



54 



23 



54 



30 







V 



4483:2131 



2 



10 



26 



10 



27 



