17 
other minerals are readily seen. The following analyses were made in the 
chemical laboratory of the Central Experimental Farm under the direction 
of Dr. F. T. Shutt, Dominion Chemist, who submitted the specimens to 
the writer. 
— 
No. 63124 
No. 63489 
Mineral matter insoluble in water 
21-25 
18*35 
Aluminium sulphate (A.ljf(SOj'))t 18 TT,0 
59-55 
53-63 
ignesinm sulphate M gSO/ 7 H?0 
18-73 
26-87 
Iron, soda, etc,* by difference 
0-47 
1-15 
- 
100-00 
100-00 
The alunogen is easily recognised. It occurs as minute, acicular, or 
capillary, pinkish w T hite crystals forming intricate masses or filling druses. 
The indices of refraction of the minute alunogen crystals were found to be 
as follows: 
a = 1-463 ± 0-003; 0-1-475 ± 0-003; y = 1-483 ± 0-003. 
WOLFRAMITE FROM MUD CREEK, ROCHER DEBOULE 
MOUNTAINS, NEAR HAZELTON, B.C. 
The specimen which furnished the material for this note was forwarded 
by Mr. H. H. Little of Hazelton, B.C. It consisted of a granular wolfra- 
mite yielding a few incomplete crystals on disintegration. The specimen 
came from a quartzose stringer in a shear zone of granodiorite on Mud 
creek. J. J. O'Neill 1 has reported the presence of wolframite from the 
Black Prince group of claims, which are situated in the neighbourhood of 
Mud creek. 
The crystals of wolframite suitable for measurement were small, of 
prismatic habit, and flattened parallel to the macro pinacoid. The forms 
identified were: 
a(100); m(110); b(010); and *(130). 
The last form is not given in Goldschmidt Winkeltabellen and is 
probably a new form. 
— 
Calculated 
Measured 
<P 
P 
9 
P 
*130 
21° 59' 
90° 00' 
22° 05' 
90 s 00' 
*New form. 
ZIRCON FROM MONMOUTH TOWNSHIP, HALIBURTON 
COUNTY, ONTARIO 
A beautiful crystal of zircon, 15 mm. in length by 7 mm. in diameter, 
was collected by M. E. Wilson at the mine of the Molybdenum Products 
Company, Limited, on lot 33, concession XYI, Monmouth township, Hali- 
burton county, about one-half mile from the village of Wilberforce. 
iQ'Neill, J. J.: Geol. Surv,, Canada, Mem. 110, pp. 25, 26 (1919). 
