Calcite from Union Springs, Cayuga co. 
Page 108 
1 Scalenohedron of the form M: (7.4.11.3) showing the position of the twin- 
ning planes of the twin crystals of type V 
2 Type V. Second generation. Crystal twinned parallel to o (0001). 
Horms. biol) (S.8aliGr3) amd Wiese) 
3 Lype V. Second generation. Crystal twinned parallel to 5, (112). 
The crystal is projected with its composition plane vertical and per- 
pendicular to: thes axis wah orms qn io ClO) hea (oe Salone) merenael 
WEE (AE) 
3a Position of the cleavage plane p. on the above twin crystal 
4 Type V. Second generation. Crystal twinned parallel to 9. (0221). 
The crystal is projected with its composition plane vertical and per- 
pendicular to theaxissi | Boral= sie 3) 
4a Position of the cleavage plane p. on the above crystal 
5 Dype VI. Second generation. Fomns: pb (0N0), y(S:8i16.3)) p, (Oum: 
m. (4041), 3. (0112), M:(7.4.11.3) and Y: (19.10.29.6) 
6 Dype! Vi- Second 7) seneration (Combination Sor snetine: lon nomic! 
parallel to o (0001) 
7 Type VII. Second generation. Penetration twin. Forms: a (1120), 
p-. (1011), m. (4041) and 38. (0112) 
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