ENDUCH.] GEOLOGY MINEEALOGICAL CATALOGUE. 359 



IdOCEASE. — Vide YESUYIAISflTE. 



Iron. — Native, in the Colorado meteorite found in 1866, S. 



JAMESONITE. — Sweet Home mine, Peters. San Juan, Sch. 



Jasper. — Green and red, station 33; yellow, red, brown, gray, Los 

 Pinos Agency, E. Throughout Middle and South Parks, M. and P. 



Labradorite. — Near Golden in the dolerites, E. Near Fairplay in the 

 trap-rock, P. 



Lead. — Native, in Hall Gulch, Summit County, Sch. At Breckenridge, 

 S. An announcement of native lead must always be received with 

 the necessary caution. The specimen owned by Professor Schirmer 

 I have seen, but, although it had a very " natural " appearance, was 

 unable to decide. 



Lepidolite. — Station 17, in a form resembling the Saxon zimuraldite, E. 



Leucite. — Table Mountain, Golden City, S. 



Leucopyrite. — Spanish Bar, S. \ 



LicoRiTE. — North Clear Creek, S. 



Lemonite. — Near station 17, E. ; in the Tertiary sandstones west of Plum 

 Creek, near Colorado City, P. ; in several localities of South Park, 

 Peters. 



Mag^'ESITE. — In small quantities in the running lode aj; Black Hawk, E. 



Magnetite. — In loose nodules on Gunnell and Procer Hills, at Central; 

 in small octahedric crystals in the gneissic rock on station 1 ; on sta- 

 tion 54, E. Oceiirring in the granites of various localities, Silver 

 Hills, White House, Capitol, in the doleritic rocks generally^ P. At 

 Idaho and Caribou, S. 



Malachite. — Is foand as the result of decomjwsition of fahlerz and 

 other minerals at the Dallas, Leavenworth, and other mines near Cen- 

 tral ; at the No Name, Caribou, Seven-Thirty, Fourth of July, and 

 others, at Caribou ; at some of the Georgetown mines ; at the Hard- 

 scrabble mines, on station 46, and other localities, E. ; at Crater 

 Mountain, in the mines of Fairplay and Elk Mountain district, P. 



Mar.casite. — Philipps mine, Fairplay, Peters. 



Mel ACONITE. — Occurring at the Gunnell, Briggs,Leavitt, Leavenworth, 

 and other mines, near Central, E. ; at the Unknown mine in Mont- 

 gomery, Peters. 



Melanterite. — On the dumps of the Wood, Dallas, and Kansas mines, 

 and others, near Central, E. ; in the Sweet Home mine, Peters. 



Mesitinits.— Black Prince lode, Lump Gulch, S. 



Meteoric iron. — Vide Iron. 



Minium. — ^Freeland mine. Trail Creek, S. 



MispiCKEL. — Together with pyrite in the Bobtail and other mines, E. 



Molybdeisite. — Leavitt mine, at Central, S. ; occurring in thread-like 

 veins in Silver Hills, near Fairplay, Peters. 



Mus(;oviTE. — In good crystals on station 2, and in the coarse-grained 

 granite near CaiLon City ; throu.ghout the granite, and partly in the 

 schist-rocks, E. 



Obsidian. — Porphyritic, in a dike, at station 27, E. ; Buflfalo Peak, 

 Arkansas Valley, and Union Park, P. 



Onyx.— Middle Park, M. 



Opal. — Milky and precious at Idaho City, E. 



Orthoclase. — In crystals in the porphyries on Gregory Hill, partly 

 altered into sanidit*. It occurs sometimes in very large pieces 

 throughout the coarse-grained granites of Colorado, E. ; in the por- 

 phyry-dike at Gold Hills, crystals of large size, M. 



Pegmatite. — At several localities in the vicinity of Georgetown,,. on 

 station 2, E. Bear Creek and Gold Hills, in Boulder County, S. 



