RADIUM 



AND 



RADIO-ACTIVE MINERALS. 



Commercial Quantities or Specimens. 



We are making a specialty of the various rare minerals con- 

 taining Radium and other radio-active elements. 



Uraninite (Pitchblende). The finest quality from the Colo- 

 rado mines. 



Carnotite, Colorado. All grades from the muddy looking 

 sandstone to the pure mineral of the brightest canary -yellow 

 color. 



Thorianite, Ceylon. Thorium, Cerium, Uranium and Lead 

 Oxides. Recently described by Sir Wm. Ramsay. Modified 

 cubes and twins, about 3 to 5 mm diameter. Smaller crystals for 

 analysis. 



Curie Collection of Radio- Active Minerals. Consists 

 of following 24 specimens of the species investigated by 

 Mme. Curie : — Uraninite (4), Cleveite, Torbernite (Chalcolite), 

 Autunite, Thorite (2), Orangite (2), Monazite, Xenotime, Aeschy- 

 nite, Fergusonite (2), Samarskite,, Columbite (3), Tantalite (2), 

 Carnotite (2). In glass-stoppered bottles fitted' in mahogany 

 cabinet. 



Fluorescent Minerals. Choice examples of Willemite, 

 Hyalite, Selenite, Aragonite, Colemanite. 



COMPLETE MINERAL CATALOG 



Contains numerous valuable lists^and tables with prices. 

 Illustrated. 216 pp., paper, 25 cents. 



Free Catalog mailed on request, giving lists and prices of 

 systematic collections and of individual specimens. 



EOOTE MINERAL CO., 



MINERALS FOR COMMERCIAL AND EDUCATIONAL 



PURPOSES. 



1317 Arch. Street, Philadelphia, 



Established 1876, by Dr. A. E. Foote. 



