RE-EXAMINATION OP AMERICAN MINERALS. 153 



" Of the dozen or more lead and copper lodes of greater or less size brought 

 to light in this quite limited region of five or six miles length and two or 

 three miles breadth, the greater number are remarkably similar in their 

 course, ranging N. 32°— 35° E. and S. 32°— 35° W.; and, what is equally 

 worthy of note, they dip with scarcely an exception toward the same quarter, 

 or south-eastwardly, though in some instances so steeply as to approach the 

 perpendicular. 



" There is no marked difference in the general character of the vein-stones 

 of the several mineral lodes, nor any features to distinguish as a class those 

 of the red shale from those of the gneiss." 



The minerals found in these veins are quite numerous, and 

 among them there are specimens of species hardly equaled in 

 beauty by those coming from any other locality. Professor 

 Silliman, in his report on the minerals of this mine exhibited 

 at the Crystal Palace, says that the specimens of sulphate and 

 molybdate of lead are the most magnificent metallic salts ever 

 obtained in lead-mining, and unequaled by any thing to be seen 

 in the cabinets of Europe. 



48. Anglesite. 



This mineral is found abundantly and in beautiful crystals 

 at this locality. The magnificence of many of the specimens 

 can only be realized by seeing those in Mr. Wheatley's cabinet. 

 The crystals are remarkable for their size and transparency — 

 in some instances they weigh nearly half a pound, being as 

 transparent as rock crystal in nearly every part. Crystals with 

 terminations at both ends have been obtained five and a half 

 inches in length by one and a half in thickness; perfectly 

 limpid crystals an inch in length are quite common. 



The following are some of the forms : 

 1. — 0, oo, l-oo 



2. — 0, ijr-dO, 00-00, 1, 00, 1-2, 1-00, 00-00 



3.— 0, 1-56, 1-56, oo, 1-2, 2-4 

 4. — 0, -|-55, oo-oo, f-|, 1, oo, 1-2, 2-4, 1-56 

 Sometimes the crystals of this mineral are full of cavities, 

 and of a milk-white color; but these do not differ in composi- 

 tion from the colorless and transparent forms. It also occurs 

 in circular crystals. 



It is sometimes colored. There is a black variety produced 

 by the more or less perfect admixture of the salphurets of lead 

 and copper (containing traces of silver) in the mass of the 



