MTN ERAS. 
Individual Specimens of rarest and choicest variety for collectors and ‘Se 
museums. “3 
Systematic Collections, comprising carefully arranged and seonantelee 
labelled type specimens of all common or important species, especially — 
adapted for educational work, are sold at very low prices. 
Special Collections, illustrating the various ores ; the uses of minerals ; 
their physical and chemical character, etc., ete. 
Minerals for Laboratory and experimental purposes at ieee rates by 
the pound. 
Detached Crystals in great variety and perfeetion for students aa. 
investigators. 
Microscopical Mounts of exceeding beauty. . = 
THE LARGEST AND MOST VARIED STOCK OF MINER- 
ALS IN THE WORLD —wnot an idle boast, but an undisputed state- 
ment of fact, supported by repeated comparisons. : 
Owing to the enormous stock accumulated, our facilities for furnishing 
mineralogical material of every kind and quality are unequalled. In no 
other establishment in the world are such a number and variety of rare and 
valuable specimens displayed for sale. Our collections for educational pur- 
poses are unexcelled for practical value, attractive appearance and low price. 
Orders receive our prompt attention. 
If you contemplate the purchase of a collection for college, school or pupil 
it will pay you to write us. 
Illustrated Catalogue 128 pp., containing complete price lists with des- 
cription of collections, etc.; and all circulars free. Send for our last “ Sup- 
plement” descriptive of r poe: st hg arrivals, 
vy heady AN ah ha 
SCIENTIFIC BOOKS, PAMPHLETS, PAPERS, PROCEEDINGS — 
AND TRANSACTIONS OF SOCIETIES, JOURNALS, ETC. 
Animmense stock. Catalogues are published in all branches of Natural 
and Physical Sciences, such as Geology, Mineralogy, Mining, Botany, Eth- : 
nology, Zoology, General Science, Microscopy, Physics, Electricity, pe 3 
Agriculture, Education, and Medicine in all branches. = 
All American books in print furnished on order, and foreign Sas 
obtained within a few weeks. 
We make a specialty of Papers published in the Proceedings and Transac- 
tion of Scientific Societies, and many of the scientific men of the country, 
recognizing the advantage of such an exchange, have placed copies of their 
papers in our hands for sale. With our ever-exchanging and constantly 
increasing stock, we can supply old and recent literature on all scientific sub- 
jects, and list of books and papers referring to special subjects will be fur- 
nished gratis on application. 
Dr. A. E. FOOTE, 
WARREN M. Foors, Manager. 
1224-26-28 North Forty-First Street, 
PHILADELPHIA, PA., U.S. A. 
. Established 1876. 
