44 Rogers — Miner alocjical Notes. 



There is no doubt as to the symbol given for k\ being the 

 correct one though it is complicated. The images were 

 excellent and the crystal was _rece rite red several times. The 

 nearest known form is (6'5'H-l), for which the calculated 

 angles are 65° 36' and 53° 40' instead of 65° 29' and 53° 48£' 

 respectively. 



(c) New form on Calcite from Frizington, England. — The 

 small acicnlar calcite crystals from Frizington, Cumberland, 

 England, seem not to have been described. 



The forms identified are as follows: m (1010), a (1120), 

 *X (5'5-lU-l), v (2131) r (1011), e (0112), and a negative scale- 

 nohedron probably B (2 , 8 , 10 , 3) and an undetermined dihex- 

 agonal prism. The pyramid of the second order %, new for 

 calcite, is the dominant form. The following measurements 

 were made with a No. 2 Fuess goniometer with diminishing 

 eye-piece. The measurements made over adjacent polar edges 

 of the pyramid show conclusively that it is not a scalenohe- 

 dron. 



Limits. Av. Calc. 



X - X 1 (5'5-TO-l) „ QO-5-51) 4 59° 33'-59° 35' 59° 34' ) , QO qar 



X ~ X v (5-5 10 1) * (5-510*1) 4 59° 34'-59° 35' 59° 34f j" * 



(d) Calcite Crystals from Eudora, Kansas. — In cavities of 

 the brachiopod fossil Enteletes hemiplicata, which occurs so 

 abundantly in limestone at Eudora, Douglas Co., Kansas, are 

 found small colorless calcite crystals. 



The_observed_forms are 5 (51164:), r (1011), e (0112), I (0445), 

 M (1010), t (2134), m (1010). a is ordinarily the dominant 

 form, though sometimes r is. The faces are somewhat striated 

 and otherwise imperfect. Consequently the measurements are 

 not all good, but they serve to identify the forms without 

 question. 



Average. Calc. 



a ^ a 1 (5164) ^ (5614) 2 14° 19' 14° 27' 



o- ^ cr v (5164) ^ (6154) 2 78° 2' 77° 54' 



e \n I (0112)^(0445) 2 11° 50' 12 D 2' 



I ^ m (0445) ^ (1010) 2 51° 39' 51° 43'' 



m/y M (1010) /v (4041) 2 14° 15' 14° 17' 



t ^ e (2134) ^ (0112) 1 21° 0' 20° 58' 



(f) Calcite Crystals from Kansas City, Mo. — Dull opaque 

 calcite crystals from 1 to 3 cm in length, occurring in a limestone 

 at Kansas City, Mo., present some peculiar features. They 

 are singly terminated and are always attached at the terminated 

 end. The other end is hollowed out and occupied by parallel 

 growths. They would scarcely be called crystals were not the 

 rough faces seen to be definitely rejated to the cleavage planes. 

 The forms are g (0552) and n- (50ol), rare rhombohedrons for 



