File:The American Museum journal (c1900-(1918)) (18133025066).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

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
6 THE AMERICAN MUSEUM JOURNAL opportunity for repeating measurements is not often offered, properly prepared molds of faces provide the ethnologist with a reliable record upon which to base his investigations. The task of making the molds from life and preparing the modeled busts for the Museum series was placed in the hands of Mr. Caspar Mayer, under the direction of the curators of the Department of Ethnology Mr. Mayer has greatly improved the old methods and has devised new processes for taking life- masks and utilizing them in connection with photographs and measurements for the rapid production of busts which represent with reasonable accuracv the individuals treated.
Text Appearing After Image:
THE COLLECTIONS ILLUSTRATING THE ROCKS AND MINERALS OF MANHATTAN ISLAND. HOSE who are; interested in local geology and mineralogy will find much to repay careful study in two collections which are on exhibition in the Museum : the rocks of Manhattan Island at the north end of the Hall of Geology, and the loan col- lection of the New York Mineralogical Club, comprising an almost complete series of the minerals of the island, which is on exhibition in Case 27 in the Morgan Mineral Hall. In addition to the collections on exhibition, there is a large study collection of the rocks which were encountered in the excavation of the Subway. The foundation of Manhattan Island consists entirely of crystalline rocks: gneiss, mica, schist, hornblende schist, serpen- tine and magnesian limestone (dolomite). Cutting through the gneiss and schist there are countless veins and dikes of granite and pegmatite, and these have supplied most of the minerals for which the island is noted. The crystalline rocks have been covered with a mantle of Glacial Drift i^unstratified gravel, sand and clay) of varying thickness, while below Fourteenth Street there are extensive river deposits of stratified gravel, sand and clay among bosses of rock (schist) most of which were below the ancient water-level. The major portion of the island consists of the gneiss and

Note About Images