Minerals, ScientiJc and Meaical Boote, Shells, Fossils, Birds, feg?, 



And all objects of Natural History, are bought, sold and exchanged bf 

 No. 122S Belmont Avenue, Philadelphia, Pa. 



(Professor of Chemistr;^ and Mineralogy ; Fellow of the American Association for the AdTaneeaeat 



of Science ; Life Memjjer of the Acadcra v of Natur;il Si^icnces, Thiladclphia, and 



American lluseum of Natural History, Central Park, N. Y. City.) 



Ill 



" My Mineralogical Catalogue of lor> patjea is Bent post-paid on receipt of 

 25 cents; heavy paper, 60 cents; bound in cloth, TScents; naif sheep, $1.00; 

 half calf,Sl.25; cloth, interleaved, Sl.oa; half sheep, interleaved, S1.25; half 

 calf, interleaved, $1.50; (price-list alone, 16 pp., 3 cents). It is profusely illus- 

 trated, and the printer and engraver charged me about $1,100 before a copy 

 was struck off. By means of the table of species and accompanying tables, 

 most species may be verified. The price-list is an excellent check list, con- 

 taining the names of all the species, and the more common varieties, arranged 

 jtlphabetically and preceded by tlie species number. The species number in- 

 dicates the place of any mineral in the table of species ; after it will be found 

 the species name, composition, streak or lustre, cleavage or fracture, hard- 

 ness, specific gravity, fusibility and crystallization, I have very many species 

 not on the price-list, and some that I had in 1876 are no longer in stock. 



Collections of Minerals for SMents, Amlenrs, Professors, PMclans, et al. 



The collections of 100 illustrate all the principal species and all the grand 

 subdivisions in Dana and other works on Mineralogy; all the principal Ores, 

 etc., etc. The collections are labeled with printed labels, that can only be 

 removed by soaking. The labels of the $5.00 and higher-priced collections 

 give Dana's species number, the name, locality, and in most cases, the com- 

 position of the Mineral; the $5.00, and higher, are also accompanied by my 

 Illustrated Catalogue and table of species. 



I have now over forty tons, and over $50,000 worth of Minerals, mostly, 

 crystallized, in stock. It is well recognized that my prices are lower and my 

 specimens better labeled than those of any other dealer in the country. This 

 is mainly due to the immense stock I carry (the largest of minerals of any in 

 the country) and my system of printed labels attached to the specirnens. 



Catalogue of 2,500 species of Shells, made for me by George W. Tryon, Jr., 

 who has labeled nearly all my shells, Scents; printed on heavy paper, with 

 genus label list, 10 cents. I have purchased one or two of the most celebrated 

 collections known, and have now over 2,000 pounds, 3,000 species, and 30,000 

 specimena of Shells and Corals in stock. Catalogue of Birds, Eggs, Eyes, 

 Skins, etc., etc., 3 cents. Catalogues of Books, 16 pp., each 3 cents. Medicine, 

 etc., 48 pp., 5 cents. (Please specify exactly what class of books you wish 

 %,atalogues of.) 



Send for the Naturalist^s I/cisure Sout^ giving full particulars. Spe* 

 c'men copy free. You will confer a double favor by hcnding this to eom*. 

 phyaiciau or other person interested in science. 



Please mention wliere you ua.w tliis. 



