UNITED STATES EXECUTIVE DEPARTMENTS AT THE INTERNATIONAL EXHIBITION, HELD AT PHILEDELPHIA, PA, 1876, UNDER ACTS OF CONGRESS OF MARCH 3,1875, AND MAY 1, 1876. IN TWO VOLUMES
ISBN 10: 1130017818
ISBN 13: 9781130017816
Release: March 6, 2012
Format: Paperback (416 pages)
This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 Excerpt: ...of this kind it is not possible to give even a partial account of the geology of a country, so it will be confined to a short history of the condition and extent of the survey. The geological survey of Norway was commenced in 1858, according to a plan sketched by Th. Kjerulf (p. t. professor of mineralogy and geology at the University of Christiania) in conjunction with his collaborator, and was placed by the home department under the direction of Kjerulf and Tellef Dahl (p. t. mining master). The work is conducted on the base of the geographical survey maps. The two or three summer months are employed in traveling, and during this time, every year since 1858, expeditions have been made, as well by the directors mentioned as by several other gentlemen engaged for traveling. Maps are published on a scale of Vttowcj a,1(l there also has been commenced the publication of detail maps on a scale of nnsWffj using the geographical survey rectangular maps as a base. The large manuscript map is composed of the district maps sirnow The institution has hitherto, from motives of economy,.not had any special bureau. The numerous specimens collected have been deposited in the inineralogical cabinet at Christiania, and various synopsis and details have been published in existing journals. The mountains of Norway consist principally of granite, gneiss, and syenite; in the eastern part are found slate and limestone. The following minerals are worked and are important in the order named--pyrites, copper ore, iron ore, silver ore, nickel ore. Magnetic and titanic iron ores have been found; lead and zinc appear in places, also traces of gold and ot coal; borings for the latter are now being made both in the north and south of Norway. BRIDGES. The exhibit of models and drawings...