Ford, Ward and Pogue — Mineral Notes. 



185 



Art. XXII. — Mineral Notes from the Miner alogical Labo- 

 ratory of the Sheffield Scientific School of Yale University. 



1. Calamine Crystals from the Organ Mts., Donna Anna 

 Co., N. M.; by W. E. Ford and Freeman Ward. 



During the past year several specimens of calamine from 

 the Organ Mts., Donna Anna Co., New Mexico, have been 

 acquired by the Brush Mineral Collection. These specimens 

 show distinct and separate crystals of unusual size and quality 



Fig. 1. 



Fig. 2. 



for calamine, resembling in appearance and character the 

 crystals from Altenberg, Belgium. Because of the rarity of 

 such occurrences of the mineral it was considered worth while 

 to measure and figure these crystals and to call attention to the 

 occurrence by a note. Unexpectedly the study revealed the 

 presence of a form apparently new to the species. 



The crystals are clear and colorless with a tabular develop- 

 ment parallel to b (010), and average about l cm by 5 mm for 

 their largest dimensions. The forms identified upon them 

 were as follows: 5(010), c(001), m(110)J (407)*, *(101), *(301), 



Am. Jour. Sci.— Fourth Series, Vol. XXVIII, No. 164.— August, 1909. 

 13 



