REPORT OF NEW JERSEY STATE MUSEUM. 19 



well as to the Museum. There were no better specimens to be 

 found at the Exposition, and, consequently, attracted much atten- 

 tion and favorable comment. 



GEOIvOGICAIv SURVEY. 



The different ores and minerals in the cases are so' grouped as 

 to show the different ores mined, and also the different products 

 secured during the concentration of the same. The samples 

 exhibited show this fairly well. 



The iron ores in the case show the best grade of ore as mined, 

 while the concentrates show the poorer grade and the different 

 products that are secured during the concentration of the lean 

 ore to a high-grade ore. 



The zinc ores also show the different ores as mined, and the 

 concentrates show the different products that they secure during 

 the concentration. Some of these products are of little value, as 

 in the case of the tailings of white limestone which is shown as 

 one of the end products, while the other product is the high- 

 grade zinc ore freed from ail detrimental impurities. Since the 

 zinc ores are found in the white limestone, we have placed the 

 limestone next tO' the zinc ores; also the gneiss and mine rock 

 occupy the same position in regard tO' the iron ores. 



The cement case shows the cement rock as mined, the different 

 ingredients added to it to make cement, and also the finished 

 product. There is also some test specimens showing the method 

 by which the cement is tested for its physical properties. 



The building stones, copper ores, glass sands and marls will 

 need very little explanation. 



The zinc minerals, which are chiefly of scientific interest, are 

 in a case by themselves, as are also' the various minerals found in 

 the trap rock series. 



MAMMALS. 



There are two large cabinets containing groups of mammals, 

 including the old and young. Eleven small ones, with groups of 

 male and female. They, with young, represent the only mam- 



