the single example of the "roller coaster" method of logging railroads

the above are pages from the book Baldwin Locomotives Volume 7

of course, only the above is available on Google books, the rest of this article on the following two pages is not on Google books.

the last excerpt is from

Deep Woods Frontier: A History of Logging in Northern Michigan

 By Theodore J. Karamansk

http://www.barnesandnoble.com/w/deep-woods-frontier-a-history-of-logging-in-northern-michigan-theodore-j-karamanski/1100870090?ean=9780814320495  or  http://www.amazon.com/Deep-Woods-Frontier-Northern-Michigan/dp/081432049X/ref=sr_1_1?ie=UTF8&qid=1417911174&sr=8-1&keywords=Deep+Woods+Frontier