3 



GEOLOGICAL 



AND 



MINERALOGICAL SPECIMENS 



Mr. KRANTZ, of Berlin, Prussia, begs leave lo inform the scientific institu- 

 tions and private collectors in this country, that he keeps constantly on hand the 

 largest stock of minerals, fossils and rock-specimens, enabling him to make up 

 collections of every extent and complete existing ones. This establishment, 

 numbering the first cabinets in all parts of the world, and the most distinguished 

 private cultivators of the mineralogical and geological sciences among its custom- 

 ers, has constantly, during twenty years, kept pace with the rapid progress of 

 these branches of human knowledge; its travelers are constantly '* en route" in 

 all countries of Europe (one of them is now in the United States,) and all efforts 

 are made to secure the acquisition of every thing new or interesting to collectors. 

 The list of minerals contains now about 800 species collected at more than 3000 

 localities, and forming a cabinet of 10,000 first rate specimens, unrivalled by any 

 known private collection, and representing the state of the science at the very 

 latest date with its most recent discoveries. Besides this standard collection, oth- 

 ers of any desirable extent, and arranged in any prescribed system, can be fur- 

 nished at prices as the adjoined catalogue shows. 



For Lecturers the instructive collections for the demonstration of the physical 

 properties of minerals, color, fracture, lustre, composition, etc., etc., are particularly 

 useful. Scale of hardness, blowpipe minerals, etc. 



Cabinets for Ladies, in elegant mahogany cases with drawers, containing, in a 

 case not larger than two feet long by about one foot in depth and breadth, 300 small 

 bu t very characteristic specimens, (price $25 ; smaller ones to order.) 

 Cabinets for Children in fine paste-board cases, at from $2-6. 

 •Minerals for Chemists, for the preparation of rare chemical substances and the 

 ^ercise of students in analyzing them, such as Uranium, Wolfram, Tellurium, 

 a Itanium, Mellite, etc., at the lowest prices. All specimens are provided with 

 printed labels, in English, German and French. 

 Orders for minerals and rock-specimens should always mention the size desired, 

 -rossi/i?. — The number of species of fossil organic remains, amounts to about 

 ^000, collected in all the principal localities of Europe and the United States. 

 All these species are carefully determined as far as the present state of the science 

 permits, and collections for the illustration of all treatises on geology, including 

 the characteristic shells of all formations, can be furnished to any extent within 

 the above number. Each specimen is furnished with a printed label indicating 

 the locality, geological formation, and name ; the collections are generally arranged 

 according"to the relative age of the formations; for special purposes zoological 



classifications are adopted if asked for. 



A separate part of the catalogue contains prices of casts of rare and interesting 

 tossils of larger size, painted in the colors of the original and forming a valuable 



implement for public cabinets. r rr , 



Hie attention of scientific men is particularly ealled to Mr. K. s collection of 

 ^aurians from the L. of W.. surpassing in some pieces for beauty and complete m , 



those of t |, 



o»€ oi the first Must urns of Europe. 

 Ichthyosauri at from $30-200. Loligo, 



other fi> 



fishes and Crinoidea of the same and 



w formations at equally moderate prices. 



Hoeks.— About one thousand varieties of roek-speeimens are on hand, forming 

 a complete serirs of all the primary and sedimentary roeks which form the known 

 8 °hd part of our globe. All the specimens of 6»ch collection are of the same size 

 and shape, so as to admit of bring arranged in an elegant manner, without un- 

 necessary waste of room in drawers or cases. 



A few geographical collections of countries interesting to geologists, such as 

 •>axony , t| JB ^mtx, Mt. Vesuvius, the Alps, Italy, Hungary, Norway and Sweden, 

 Mexico, and some others are still on hand. 



