File:The American Museum journal (c1900-(1918)) (17973421279).jpg

Title: The American Museum journal
Identifier: americanmuseumjo06amer (find matches)
Year: c1900-(1918) (c190s)
Authors: American Museum of Natural History
Subjects: Natural history
Publisher: New York : American Museum of Natural History
Contributing Library: American Museum of Natural History Library
Digitizing Sponsor: Biodiversity Heritage Library

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DEPARTMENT OE MINERALOGY 65 specimen known as the "Baltimore Mastodon," and series of upper and lower teeth which together w4th the above form the principal subject of Professor Warren's great memoir jjublished in quarto form in Boston in 1855. The collection also includes the backbone and portions of the skull of the whale-like animal Zeuglodon formerly known as Hydrarchiis. . Another important feature of the collection is a series of Connecticut valley footprints of Dinosaurs, many of the specimens being of rare perfection. The skeleton of the Ornithorhynchus in the collection was probably the only one in the country, when it was obtained. There are also casts of palaeontological specimens, some of which are very difficult to procure at the present time. DEPARTMENT OF MINERALOGY.
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jOME interesting additions to the Mineral Cabinet are worthy of notice, among which is a group of Olivine (Peridot) crystals from Egypt. The crys- tals show prisms, domes and pyramids with noticeable compression. This new source of Peri- dot has considerable interest. The Peridot gems of collections have largely come from the East, but their exact origin was unknown. Mr. Kunz has suggested that they must date back to the time of the Crusades, having been brought from the East, and from time to time found their way into commerce from churches and cloisters. The new locality is somewhere in Upper Egypt near the Red Sea, and was iDrobably the source, or near the source, of the gems of the Levant. Some fine cut Peridots are to be seen in the Morgan Collection of Gems. A specimen of the new and uncommon Chalmersite is among these additions. This mineral occurs in fluted orthorhombic crystals on dolomite, associated with pyrrhotite, chalcopy- rite and siderite in the gold mine at Morro Velho in Minas Geraes, Brazil. The crystals are usually twinned, lustre metallic and color a bronze yellow.

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