OF INTEREST TO THE SCIENTISTS. 



During the past month we have been very busy cataloguing our stock and 

 new additions to it and the result is a number of pamphlets a brief descrip- 

 tion of which we give below : 



OUK NEW MINERAL CATALOGUE. 



This consists of 28 pages and contains a list of minerals with prices just 

 to give you an idea of the variety and immensity, as well as the large 

 number of new minerals we now have on hand. The recent new finds will 

 be found well represented. This catalogue will be a useful and interesting 

 addition to your literature on Mineralogy. 



OUK NEW GEM CATALOGUE. 



This 12-page catalogue will be found a treatise not only on all the precious 

 and semi-precious gem stones found but also of the Synthetic Gems, describ- 

 ing how they are made, with photo-engravings from actual examples showing 

 the chemicals used, the gem material in raw state and the gems after being 

 cut ready for mounting. 



This catalogue describes the different collections we have prepared to show 

 them in their various forms and colors. Not the least interesting feature 

 are the Antique Gems and Jewelry which are worn at the present time. 



CALIFORNIA MINERAL CATALOGUE WITH COLORED PLATE. 



This gives a brief description of the immense stock of California minerals 

 and gems, also new finds that we have on hand. As is well known, California 

 has become the greatest Gem State in the Union, and to show you the beauty 

 of some of her gems, we have prepared a plate in the natural and brilliant 

 colors of two of the finest crystals ever found. One is in the Harvard 

 University and the other in a well known private collection. Both were 

 originally in my stock. This picture will be a fine addition to any studio 

 or collection, as the colors are faithfully reproduced and the plate is not 

 attached to the catalogue. 



HOW AN INSPIRATION BECAME AN ACTUALITY. 



This is a little sketch, illustrated with eight half tones, showing the parts 

 of our studio and laboratory and myself and assistants at work. It was 

 written by the editor of the ' ' Guide to Nature " and is reproduced just to 

 show how our stock of interesting specimens inspired and interested him. 

 We trust it will interest you. It originally appeared in " The Mineral 

 Collector," to whom we give credit. 



All the catalogues will be sent free of charge. In writing please mention 

 the Journal, of Science. 



ALFRED H. PETEREIT 



261 West 71st St., New York City. 



