106 
TRANSACTIONS OF THE 
[Nov. 27, 
The following is a list of the angles measured and calculated :* 
Faces. 
001:100 
001:101 
001: 102 
001 :201 
001:101 
001 :102 
001 :103 
001:011 
OL 
001:111 
100:101 
100:210 
LOOP ATE 
100 :211 
100: 110 
100: 201 
210:110 
111:111 
102:101 
201:101 
101 :102 
102:103 
PAL OA UU 
Angles meas. 
6H°2/ 
34°50! 
22°36! 
89°2! 
63°26/ 
BY: ead (4 
21°22 
H8oo. 
52°84! 
74°50! 
292 Her 
35°42’ 
49°35! 
34°9/ 
54°26/ 
ZO 200! 
19°23’ 
61°41’ 
12°18/ 
Angles cale. 
64°59! 
34°53! 
22°361 
89°]! 
63°24 
34°15) 
22°10! 
58°92! 
52°9! 
74°49 
30°6 
35°53! 
49°40! 
34°15! 
54°34! 
26° 
19°281/ 
61°38! 
12°162/ 
Reflections were so poor in some cases that only approximate 
readings could be made, but a sufficient number of these read- 
ings were taken to establish with certainty the identity of all 
the forms. 
Much assistance has been rendered by Prof. J. F. Kemp, of 
Columbia College, by suggestions and by the loan of crystals 
*E.S, Dana, New System of Mineralogy, 1892, Allanite, p. 522. 
