CRYSTALLIZED ORPIMENT! 



This new occurrence from Utah, promises to be the most interesting Ameri- 

 can find of the year, since it will probably lead to the establishment of the 

 species in the monoclinic, instead of the orthorhombic system. The simi- 

 larity between the habit of these crystals and those of Gypsum (both simple 

 and twinned forms) is very marked, and the results of the investigation Prof. 

 Penfield is now making are awaited with much interest. 



The mineral occurs in large groups of well defined and perfect crystals, of 

 a size and quality much superior to the German examples known to 

 mineralogists. We have secured from collectors who spent several days in 

 mining for them, two lots, comprising all of the best specimens found, 

 which far excel the samples first sent East. They are of bright color and 

 make a showy and interesting addition to any cabinet. Though reported to 

 be quite rare, our prices are low, the best crystallizations costing from $1.00 

 to $5.00, while very pretty specimens can be had for 10c. to 75c. 



THE PURCHASE OF THE ENTIRE COLLECTION of a Ches- 

 ter Co., Pa., mineralogist, has given us a full suite of Limonite after Pyrite, 

 Penninite, Brucite, Roseite, Ankerite, Anglesite, and other things of 

 local and historic interest. 



SELENITE, in bright and perfect doubly-terminated crystals of 1 to 13^^ 

 inches in length at 10c. to 20c. each. Gangue specimens 50c. each. 



We are able to offer our patrons a great variety of polished minerals, includ- 

 ing Rutilated Quartz, sections of Stalactitic Barite, Perthite (Sunstone), 

 Rose Quartz, Green Opal, Opalized Wood, Smithsonite from New Mexico, 

 Malachite and Azurite in alternate layers, and beautiful Wyoming Moss 

 Agates of a shade so closely approaching the "Delft" ware as to make 

 them quite popular. 



MINERALS SENT ON APPROVAL, to responsible parties, in any 

 part of the world, by freight, express, or post. (We deliver them to you 

 free of charge with privilege of selection and return.) 



Catalogues and Circulars on application. 



SCIENTIFIC BOOKS. 



One of the largest stocks in America. 



Catalogue just out on subjects of Geology, Paleontology, Geological Sur- 

 veys, Mineralogy, Crystallography, Lithology, Meteorites, Mining^ and Metal- 

 lurgy. If you are looking for books it will pay you to send for our lists. 



{Please mention subject.) 



Dr. A. E. FOOTE, 



Wakren M. Foote, Manager. 



12a^-S6-S8 I^Tortll in or ty- First Street, 

 PHILADELPHIA, PA., U. S A. 



