File:Holt prototype track-type tractor 1905.jpg

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English: Holt Steamer No. 77, the second prototype of a crawler-track-type tractor built by the Holt Machinery Company of Stockton, California in 1905. It is shown on a trial run on Roberts Island, demonstrating its capability at navigating across the peat soil of the delta island. The tracks revolved around rough sprockets driven by long exposed chains. The track shoes were heavy blocks of redwood.
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Source http://truebluesam.blogspot.com/2009/06/weekend-steam_26.html
Author Unknown authorUnknown author
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current03:53, 25 February 2010Thumbnail for version as of 03:53, 25 February 20101,112 × 904 (487 KB)Btphelps{{Information |Description={{en|1=The second prototype of a track-type tractor built by the Holt Machinery Company of Stockton, California in 1905. It is shown on a trial run on Roberts Island, demonstrating its capability at navigating across the peat so
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