443 PROCEEDINGS OF THE ACADEMY OF [Nov., 



No. 4. Zinc blende from Joplin, IMissouri, coated with greenockite 

 (cadmium sulphide) and marcasite (FeSj) and some small crystals of 

 calcite. These minerals are all associated with and deposited upon the 

 dark blue flint which is characteristic of the Joplin lead and zinc 

 deposits. This flint is of secondary origin and obtains its blue color 

 from association with the ])lack muck derived from the coal shales 

 that once overlaid the ore deposits, but now almost entirely removed 

 by erosion. The paragenesis of these minerals is well illustrated in 

 this specimen: first we have the large zinc blende (sphalerite) crystals, 

 upon them the marcasite and then the greenockite; finally the small, 

 almost microscopic cr3^stals of .calcite, one laid down upon the other 

 in orderly succession. There is another mineral deposited upon the 

 flint at the base of the large sphalerite crystals, but as yet he had been 

 unable to determine its name. It is fibrous, resembling asbestos or 

 some of the zeolites, and microscopic in size. 



Nos. 5 and 6. Two pseudomorphs, one of sphalerite and the other 

 calamine, after fossils. These minerals were found some seven or 

 eight years ago in a certain mine of the Joplin district. He believed 

 them to be quite rare, for he had never seen but one or two others of a 

 similar kind and they were from the same deposit. The particular 

 fossil which has been replaced by the zinc minerals is a coral, one 

 of the Zaphrentis. 



No. 7. An interesting fossil from the zinc deposits near Springfield, 

 Missouri. It is one of the Brachiopoda (a Spirifer). On its lower edge 

 is a beautiful nearly perfect dodecahedral crystal of sphalerite, the 

 association of the two constituting an interesting specimen. 



No. 8. An association of pink crystallized dolomite with barite 

 (BaS04) and sphalerite. Barite is rather rare in the Joplin district, 

 but very common in other parts of Missouri, notably in the lead district 

 of the southeast. 



Dr. Henry Skinner made a communication on the scientific results 

 of a visit to Saskatchewan made by him last summer. (No abstract.) 



The following was adopted : 



The Academy having heard with profound regret of the death of 

 Prof. Angelo Heilprin on the 17th of last July, desires to put on 

 record an expression of its sense of the loss which science has thereby, 

 sustained and of its appreciation of the work accomplished by him as a 

 student, administrator and explorer during the years of his connection 

 with the society from 1879 until within a few weeks of the termination 

 of his life. 



The Academy considers it a cause of congratulation that much of 

 the work accomplished by Prof. Heilprin during those years was 

 materially forwarded by the resources of the library and museum and 

 by the encouragement of his colleagues. It desires to express to his 

 relatives its sincere sympathy in the bereavement they have sustained. 



