Trans. N. V. Ac. Set. 26 Nov. 13, 



November 13, 1882. 



Section of Chemistry. 



Vice-President, Dr. B. N. Martin, in the Chair. 



Sixteen persons present. 



The following specimens were exhibited : by Mr. G. F. KuNZ, cro- 

 cidolite catseye, from Cape of Good Hope : by Mr. Julien, a young 

 echinus, curious shelly aggregates of sand, ten cm. in diam- 

 eter, from the beach off the Navesink Highlands, N. J., and a fos- 

 sil Ostrea, found in the boulder clay, in 112th street, between 

 Ninth and Tenth avenues, New York city : by Mr. N. H. Darton, 

 supposed clintonite, from a vein five cm. thick in serpentine, at 

 Honolulu, Sandwich Islands. 



Prof D. S. Martin identified the echinus as a very small and 

 young individual oi Echinarachnius parma, belonging to the New 

 England coast at its southward limit, hardly ever found before on 

 the beaches of New Jersey, though reported to occur on a far out 

 bank. 



The Chairman showed that the sandy aggregates were the egg- 

 casts of a large species of the moUusk, JVaiica, known to occur along 

 that beach, and that the fossil exhibited, probably Ostrea, was the 

 first he had seen from the till of New York Island ; and further re- 

 marked on the distribution of the oyster along the Atlantic coast 

 of this continent. 



A paper was read by Dr. Pierre De P. Ricketts, entitled; 



analysis of the franklinite ores of new jersey, and meth- 

 ods FOR THE SEPARATION OF THE RED OXIDE OF ZINC. 



(Abstract.) 

 Some time since, my attention was called to the question of deter- 

 mining a method for estimating the amount of Red Oxide of Zinc, con- 

 tained in certain deposits of these Franklinite Ores. Some of the re- 

 sults obtained have not been pubhshed. other than in the testimony 

 taken in law suits about these deposits. 



The methods employed were briefly as follows : 



The first was a mechanical separation, made by Mr. A. F. Wendt 

 and myself, for the purpose of obtaining the mineral constituents of the 

 samples treated, as nearly as possible. 



The ore was crushed down to below 40 meshes to the inch, and 

 sieved. The Franklinite was then extracted by the magnet from an 

 average portion of the sample, and the red oxide separated by hand, 



