Information
Digital ID
snv002396-021
UNLV Special Collections provides copies of materials to facilitate private study, scholarship, or research. Material not in the public domain may be used according to fair use of copyrighted materials as defined by copyright law. Please cite us.
Please note that UNLV may not own the copyright to these materials and cannot provide permission to publish or distribute materials when UNLV is not the copyright holder. The user is solely responsible for determining the copyright status of materials and obtaining permission to use material from the copyright holder and for determining whether any permissions relating to any other rights are necessary for the intended use, and for obtaining all required permissions beyond that allowed by fair use.
Read more about our reproduction and use policy.
I agree.Early day steam tractor engines pulled trains of copper ore in the mountain areas and hauled borax in the desert. The big, high wheels helped the machines get out of holes and over obstacles. The idea of the crawler was 100 years old, yet it was Ben Holt who, in 1904, successfully demonstrated it as a unit. This treadmill type machine picked up and laid down it's own portable railroad as it moved over rocks, snow and mud.